A Patient with Primary Insomnia Asks the Nurse Why Day

A patient with primary insomnia asks the nurse why day naps do not compensate for a lost night's sleep.Select the nurse's best reply.

A) "Circadian cycles give daytime naps a structure different from nighttime sleep."
B) "The body clock operates on a 25-hour cycle,making nap effectiveness unpredictable."
C) "It is a matter of habit and expectation.We expect to be more refreshed from a night's sleep."
D) "Sleep restores homeostasis but works more efficiently when aided by melatonin secreted at night."