Question

like most adults, samantha spends 75 percent of her sleep time in
rem sleep.
deep sleep.
nrem sleep.
dream sleep.

Explanation:

Adult sleep is divided into NREM (non-rapid eye movement) and REM (rapid eye movement) sleep. NREM makes up roughly 75-80% of total sleep time for adults, while REM (also called dream sleep) accounts for the remaining portion. Deep sleep is a substage of NREM sleep, not the full majority of sleep time.

Answer:

C. NREM sleep.