Danita goes to bed at 10 P.M. and quickly falls asleep. She sleeps soundly until 6 A.M. the next morning. Between 2 A.M. and 6 A.M. Danita will most likely experience:
A long episodes of REM sleep.
B hypnagogic hallucinations.
C the complete absence of NREM sleep.
D long episodes of stages 3 and 4 NREM sleep