You are answering a USMLE-style medical question. Question: A 24-year-old man is brought to the emergency room by the police after a fall. The patient smells of alcohol and is slurring his words. You find out that he has recently been fired from his job as a salesperson for months of tardiness and poor performance. The police tell you that his girlfriend, who was there at the time of the fall, mentioned that the patient has been struggling with alcohol for at least a year. Upon physical examination, the patient becomes agitated and starts yelling. He accuses his ex-boss of being a cocaine addict and says he couldn’t keep up sales percentages compared to someone using cocaine. Which of the following psychiatric defense mechanisms is the patient demonstrating? Options: A) Denial B) Displacement C) Projection D) Regression Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.