Which of the following is TRUE regarding infants' sleep?
a. Infants spend a greater proportion of time in REM than do adults.
b. Infants in different cultures have very similar sleep patterns suggesting that the environment plays no role in the sleep-wake cycle.
c. The average newborn sleeps 16–17 hours per day.
d. On average, male infants sleep longer than their female counterparts.
Answer: A
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