<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 19-year-old man is seen by his primary care physician. The patient has a history of excessive daytime sleepiness going back several years. He has begun experiencing episodes in which his knees become weak and he drops to the floor when he laughs. He has a history of marijuana use. His family history is notable for hypertension and cardiac disease. His primary care physician refers him for a sleep study, and which confirms your suspected diagnosis.Which of the following is the best first-line pharmacological treatment for this patient?? A: Dextroamphetamine, B: Lisdexamfetamine, C: Methylphenidate, D: Zolpidem, E: Modafinil,  <response>: This is a clinical vignette describing a 19-year-old man with a history of excessive daytime sleepiness and episodes of cataplexy triggered by laughter. The sleep study confirms a diagnosis of narcolepsy. The question asks about the best first-line pharmacological treatment for this patient. Based on the clinical presentation, the choices provided, and guidelines for treatment of narcolepsy, the correct answer should be a wake-promoting agent that can treat both excessive daytime sleepiness and cataplexy in narcolepsy.E: Modafinil 