You are answering a USMLE-style medical question. Question: A 28-year-old man reports to his physician that he is having second thoughts about his long-term compatibility with his wife ever since they relocated to a new city. He admits that he has noticed himself flirting with some of the female co-workers at his new workplace. When he goes on a dinner date with his wife after work one evening, he accuses her of giving their waiter flirtatious looks and asks her whether she has been cheating on him or trying to spend time with other men. The man’s actions are most consistent with which of the following psychological defense mechanisms? Options: A) Displacement B) Dissociation C) Projection D) Repression Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.