Which statement best expresses the central idea of the text?

A. Older teenagers function better during the day if they are allowed to take several short naps.W

B. Adults require 8-10 hours of sleep a night to remain healthy, while teenagers require even more sleep.

C. Depending on their age and personal needs, teenagers require about 8-10 hours of sleep a night to stay healthy.

D. When teenagers fall asleep, their unique biology prevents them from staying asleep for the recommended 8-10 hours.