what sleep disorder requires a medical specialist?\no drowsiness\no bad dreams\no sleep apnea\no going to…

Brief Explanations:

Sleep apnea is a serious sleep - disorder where breathing repeatedly stops and starts during sleep. It often requires evaluation and treatment by a medical specialist such as a pulmonologist or a sleep medicine specialist. Drowsiness can be a symptom of many things and not always a serious disorder needing a specialist. Bad dreams are a common occurrence and usually not a medical condition requiring a specialist. Going to bed late is a habit rather than a medical disorder needing a specialist.

Answer:

C. sleep apnea