Our biological clocks make us feel most sleepy from?

A. 9pm-5am
B. 6pm-6am
C. 10pm-4am
D. 12am-7am

5 answers

http://healthfinder.gov/prevention/PrintTopic.aspx?topicID=68
hi do anybody know the ansner to this question??
10pm to 4am answer C
A and C are both wrong.
LoL. Mine is 12am-7am... don't know if that's the correct answer though.