Your Friend Has Been Having Some Psychological Problems, and He

Your friend has been having some psychological problems, and he tells you that he and his wife are seeing a couples therapist. You are surprised that he is receiving couples therapy, since he is the one with problems. When you ask your psychology professor about this, she explains that

A) there must have been some mistake.
B) successful couples therapy can remove the cause of an individual spouse's problem.
C) your friend was probably resistant to individual therapy and couples therapy is less threatening.
D) your friend's problems must actually be marital problems, not individual problems.