Maybe I am wrong, but I think that if you accept (B) as the conclusion, and the question was regarding weakening the argument, I think (D) could be a correct answer.

Did anyone else interpret (B) and (D) as assumptions? Was I incorrect in my analysis?

I am over in Kailua, but I would be happy to study together if you are still looking.

11/13 on hardest! Too bad I cannot ever seem to perform this well on PTs...