C. To avoid situations in which alcohol is present and remain alcohol free.
Explanation:
A. Is right as well but C is more right because it tells you exactly why you're learning them; to avoid situations that you don't want to put yourself in.
Peer pressure works when peers taunt you into doing something you know can be bad, idiotic, of even harmful. Learning how to say "No" can help you with pressuring. C. could be a possible answer, but refusal skills aren't only for beverage situations, so the best answer I believe is A.
