Alexis most enjoys talking and socializing with friends late in the evening.Her mother,however,is most energized for social interactions about an hour after breakfast.This difference between Alexis and her mother is best explained by the fact that age and experience tend to alter our

A) REM rebound.
B) N2 sleep.
C) hypnagogic sensations.
D) circadian rhythm.

The differing preferences for social interaction by Alexis and her mother can be attributed to their internal circadian rhythms, which are influenced by age and experience. The circadian rhythm is the internal biological clock that regulates various physiological and behavioral processes in a 24-hour cycle, including sleep-wake cycles and periods of alertness. As we age, our circadian rhythms tend to shift, resulting in changes in our preferred times for certain activities, such as socializing.