As a new clinical social worker you find yourself being told by your supervisor you need to be more confrontational. This seems at odds with the social work mission, until you supervisor explains the primary purpose of confrontation is to:

The correct answer is C Client's often have inconsistent views and values concerning a specific problem. This is a HUMAN problem we all fight with. Conflicts between what a client 'thinks' should be the solution and what the actual solution will be is the bread and butter of therapy. Just because we know we should do something does not mean we will act in the appropriate manner. (Think about cigarette smoking as an example)
A is INCORRECT. You demonstrate an accurate understanding by reflective listening (telling the client what you think you heard them say) and by asking questions for clarification. This response back to the client is the primary component of active listening. Rather than passively saying...Uh huh...
B is INCORRECT. This is the ultimate goal of many therapies and an end result you should always look to achieve. However, there are many ways to achieve it without confrontation.
D is INCORRECT This is definitely a part of therapy. Helping client's see alternatives and supporting them in their attempts to change their behavior is very powerful therapeutic intervention. But there are more ways to achieve this than through confrontation.