Researchers Have Found That, with Regard to Adolescent Sleep Patterns

Researchers have found that, with regard to adolescent sleep patterns:

A) adolescents today are getting more sleep than adolescents 30 years ago.
B) the reason that high schools begin classes earlier than middle schools or junior high schools is that adolescents are more alert during the morning hours than later in the day.
C) getting inadequate sleep is associated with poorer mental health and lower grades for adolescents.
D) although most adolescents do not get sufficient sleep during the week, they are able to make up for the deficit by sleeping later on weekends.