My take is Option C (after carefully analysing Option D).
My Explanation:
Argument: Justin Karet is not believed to be credible person. He claims that he will not travel to a poker tournament more than 30 minutes, even if he is expected to win that tournament
Fact: Justin Karet recently sighted at the Fulterton Poker Tilt, a sanctioned tournament event held 90 minutes from his hometown of Guerra
Approach: We need to find an option that makes Justin Karet claims credible. Lets evaluate the options:
Option D: Karet was offered a significant appearance fee to attend the tournament.
hmm..That means Karet has the incentive to attend the tournament. Now two scenarios may occur:
Scenario 1: Karet accepted the appearance fee, but Karet lives nearby the event location (say 20 min. drive). In this case Karet claims are credible (in reference to the argument)
Scenario 2: Karet accepted the appearance fee, but Karet lives far from the event location (say 5 hrs. drive). In this case Karet claims are not credible (in reference to the argument)
Hence Option D may or may not be the right answer.
Now consider Option C: Karet no longer lives within an hour’s drive of Guerra.
Interesting. Also the event location is 90 min. drive from Guerra. That means Karet has travelled <= 30 min. to reach to the event location. This leaves no room for any other scenario. Hence, Option C.
Thanks,
Chanakya
Hit kudos if you like the explanation