题目内容：
What is implied in the second paragraph?A Young children’s biological clock has the same rhythm with that of the teenagers.
B People after puberty begin to go to bed earlier due to the change of the biological clock.
C Children before puberty tend to fall asleep earlier at night than adolescents.
D Teenagers go to bed later than they used to due to the light from the computer screen.
参考答案：【答案仅供学习，请勿对照自行用药等】
答案解析：