Which option represents the DSM-5-TR criterion for Insomnia Disorder?

• A. A Sleep disturbances are defined only in terms of daytime fatigue.
• B. Persistent difficulty initiating or maintaining sleep or early morning waking with inability to return to sleep, occurring at least three nights per week for three months, with distress or impairment.
• C. Sleep disturbances must occur daily for six months.
• D. Insomnia Disorder is diagnosed when there is a comorbid anxiety disorder.

Answer: (B)