You are answering a USMLE-style medical question. Question: A 46-year-old woman presents with difficulty initiating sleep, as well as frequent nighttime awakenings. She reports making multiple mistakes at her office job, has an inability to concentrate, and feels sleepy throughout the day. She is worried that her sleeping troubles will cause her to get fired. Which of the following would best treat this patient’s insomnia pharmacologically? Options: A) Chlordiazepoxide B) Triazolam C) Diazepam D) Modafinil Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.