A recent study showed that the constant roar of jet aircraft could be

Split 1:
'to have' vs 'having'-- Since the indefinite form 'to+verb' is used to denote purpose or intent, it is best avoided here. 'the possibility to have' implies that the children intentionally want the high blood pressure which doesn't seem to be the case. 'of having' refers to the consequence without the intent. Hence, A,B, and D are out.

Split 2: Between C and E--
C is much more concise. It uses 'impact' as a verb as opposed to option E which uses 'impact' as a noun. The adverb 'seriously' helps to attain this concision, not to mention the parallelism.

Thus, I would go with option C.

possibility of something is the correct idiom
so A, B, and D are out
now in option C and E
c says constant roar seriously impact the psychological well-being of children
it can't by itself impact well being of children it can have an impact on well being of children so c is out
E is correct since constant roar can have an impact on well being of children

egmat could you please me to explain why the option is E instead of C. C looks much more precise and it is also parllel

hi, can you please explain why option E, makes a better choice over option C. I was confused between the 2 and ended up going with option C.

I am unable to understand difference between
have an impact on well being and
impact well being

Chose C as it was a more concise way.

I am not really sure of the reason why option E is correct over C?
Bunuel VeritasKarishma please advise on the explanation ..

Is the construction " impact on psy... is superior than impact the psy... ( perhaps the later on is changing the meaning). still need OA to understand the difference correctly. i

IMO

Answer C is definitely correct
seriously impact is parallel to sharply increase (verb to verb)

Answer E is wrong because:
a serious impact is not parallel to sharply increase(noun to verb).

Thanks = Kudos

Some people think that using impact as a verb to mean affect is not correct (I'm not saying that I agree with them).
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I also marked C.
Logic:
1. Verb form vs Noun form making the concision more logical
2. Parallelism is maintained

the OA, i.e. E, made me ponder over the logic that [b]constant roar of a jet engine[\b] (Cannot be the doer) can itself not hurt XXX. The OA makes sense. Also, Parallelism is maintained.

Could one of the experts please explain why E is the OA and not C.

Hello, AkashM. I think AjiteshArun touched on this very point in his post above. As far as I know, this affect-versus-effect (verb-versus-noun) concern surrounding impact is not one that GMAC™ has used to create a split in an official question. For my part, I prefer the phrasing of (E) to (C), but I am not overly fond of adverbs...

Good luck with your studies.

- Andrew
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Damn! It took me 10 mins to understand what you and Ajitesh are trying to say.

Appreciate the help! Thanks and kudos to both of you.

Looking at my post now, I can only imagine that I was in a bit of a hurry when I wrote it.

Here is a slightly better response for anyone else who wants to evaluate this question:

i. Impact as a noun:

1. ~the action of hitting or colliding
A sufficiently strong impact could deflect an asteroid. ← "A strong collision could deflect an asteroid"

This is absolutely fine.

2. ~an effect
The are studying the impact of buybacks on stock prices. ← "... studying the effect of buybacks..."
The impact on EPS is likely to be significant. ← "The effect on EPS is likely to be significant"

This is absolutely fine.

ii. Impact as a verb form:

3. ~hit
The DART spacecraft will impact a small moonlet. ← "DART will hit a small moonlet"

This is absolutely fine.

4. ~affect
Stock buybacks impact earnings per share. ← "Buybacks affect EPS"

Some people would not use impact as a verb to mean affect.

iii. Impact on as verb

5. ~affect
Stock buybacks impact on earnings per share. ← "Buybacks affect EPS"

Many people would be uncomfortable using impact on as a verb to mean affect.

I would not expect to see (iii) (impact on as a verb) in the correct option (similar, official question), but option C uses impact as a verb to mean affect. Although some people would object to this, it is widely accepted. For this reason, I wouldn't advise a test taker to worry too much about this question.

To summarize: (a) this may not be a good question, and (b) you should be suspicious only of (iii) (impact on as a verb).
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The word 'could' is the past tense of 'can'. It's used to mean that somebody was able to do something in the past. So the former sentence means that he was able to climb the mountain. The phrase "could have" is used to mean that somebody was capable of doing something, but he actually didn't do it. So E is a better choice than C.

C. could seriously impact the psychological well-being of children living near airports and sharply increase their possibility of having
- The constant roar can do it but is not doing it
- I could do it

E. could have a serious impact on the psychological well-being of children living near airports and sharply increase their possibility of having

Could have means - The possibility of a serious impact
- I could have done it - It was possible

Can anyone please explain why is E preferred over C?
It will be really helpful if someone knows a similar example from OG.

Hi Giovanni1502,

C looks like this: "X could seriously impact Y". Impact is used to mean affect here, so we can read option C like this: "X could seriously affect Y". Some people feel that impact cannot be used to mean affect, but, because this is not an official question, we don't know whether this "rule" is something that can be applied on the GMAT.
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Could u pls confirm why C is incorrect since it is parallel

By parallelism, the option should have been D, however, the correct one is E. Unable to understand why, and no satisfactory response has been given so far.

I would appreciate an expert to opine on this.