Which Statement Best Describes the Circadian Rhythm

Multiple Choice

Which statement best describes the circadian rhythm?

A) In a 24-hour period of time,we feel the most awake after eating breakfast.
B) In a 24-hour period of time,we feel most sleepy during brightest period of the day.
C) In a 24-hour period of time,we spend a period of time awake and a period of time asleep.
D) In a 24-hour period of time,adults require at least 8 hours of sleep to feel rested.