Which of these predictions is best supported by the
information provided?

Answer:
I think Evan will sign up for a school club because he is determined to make friends
Explanation:
Evan mentioned that it was tough to "get to know them through a class discussion or study session" and "everyone seemed paired off or in tight groups". Which indicates he was trying to make friends, but wasn't really doing well so far. So, the answer is that he will sign up for a school club (which he's already showing interest in) because he is determined to make friends.