"Day People" Wake Up Alert, Are Energetic Early in the Day

Multiple Choice

"Day people" wake up alert, are energetic early in the day, and fall asleep early in the evening, while "night people" wake up groggy, are lively in the afternoon or early evening, and stay up late. This occurs because "day people" have early peaks and "night people" have later peaks in their

A) ASCs.
B) sensation-seeking patterns.
C) circadian rhythms.
D) opponent processes.