Twila Has No Problems Going to Sleep at Night,but She

Multiple Choice

Twila has no problems going to sleep at night,but she wakes up often during the night and considerably earlier than she would like to each morning.She does not feel rested when she gets up for the day,and since the problem has existed for weeks,her job performance is being affected.What is Twila's problem?

A) Narcolepsy
B) Insomnia
C) Sleep apnea
D) A REM-sleep behaviour disorder