Mary Carskadon and Her Colleagues Concluded from Their Research of the Sleep

Mary Carskadon and her colleagues concluded from their research of the sleep patterns of U.S.adolescents that:

A) schools should start and end earlier to help adolescents to keep to earlier bedtimes.
B) early school starting times may be linked to negative outcomes for adolescents.
C) early school starting times are conducive to the sleep patterns of older adolescents but not to those of younger adolescents.
D) early school starting times are most conducive to the sleep patterns of adolescents.