You are answering a USMLE-style medical question. Question: A 30-year-old man presents to his primary care provider complaining of drowsiness at work for the past several months. He finds his work as a computer programmer rewarding and looks forward to coming into the office every day. However, he often falls asleep during meetings even though he usually gets a good night sleep and has limited his exposure to alcohol and caffeine in the evening. His past medical history is noncontributory. His vital signs are within normal limits. Physical examination is unremarkable. The primary care provider recommends keeping a sleep journal and provides a questionnaire for the patient’s wife. The patient returns one month later to report no changes to his condition. The sleep journal reveals that the patient is getting sufficient sleep and wakes up rested. The questionnaire reveals that the patient does not snore nor does he stop breathing during his sleep. A sleep study reveals mean sleep latency of 6 minutes. Which of the following is the best course of treatment for this patient’s condition? Options: A) Methylphenidate B) Sodium oxybate C) Imipramine D) Increase daytime naps Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.