Which of the following statements about the sleep cycle is TRUE?
A. NREM sleep always precedes REM sleep.
B. REM sleep occurs only once per night.
C. Adults typically experience four to six sleep cycles per night.
D. NREM sleep stages are all equally restorative.
E. Infants spend more time in NREM sleep than adults.
Choose the correct answer from the options given below:
1
A, C, and D Only
2
A, C, and E Only
3
C and E Only
4
C and D Only