You are answering a USMLE-style medical question. Question: A 45-year-old woman presents to the clinic with her husband to discuss her most recent problem. She and her husband recently bought a new house in the area. While cleaning the house, they discovered a nest of spiders. She reports blacking out and waking up outside the house with a bandage on her arm. Her husband says that she began screaming and ran out of the house, breaking a window, and cutting her arm. The patient says she has tried to enter the house several times over the last several months but can not bring herself to cross the threshold for fear of more spiders. She wants to overcome her extreme and irrational fear. Which of the following is the most effective treatment to overcome this patient’s arachnophobia? Options: A) Desensitization B) Metoprolol C) Alprazolam D) Psychotherapy Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.