Final answer:
The client's statement in option D indicates the use of denial as a defense mechanism. The correct multiple-choice option is (D) "My family thinks I have a problem, but I don't see it.".
Step-by-step explanation:
The answer is D) "My family thinks I have a problem, but I don't see it." This statement indicates the use of denial as a defense mechanism. Denial is when a person refuses to acknowledge or accept a reality that is uncomfortable or threatening to them. In this case, the client is disregarding the concerns of their family and is unable to see or admit that they do have a problem with alcohol. The correct multiple-choice option is (D)