The correct answer is A.
The best way to resist peer pressure is to assertively and confidently say you don't want to do something. That way you are giving a clear message to the other person what your decision is and there can be no confusion. You say no but in a way that you mean it, it doesn't have to be aggressive, just assertive as mentioned and confident. If you go with the other two options you are avoiding the subject which means it will come up again and you will have to deal with it at a later time.
