Respuesta :
All humans require good amount of sleep but teenagers are at a growing age and that is why they are most importantly required to sleep well.
1. D. Sleeping for 8-10 hours a night supports teenagers' mental development and guarantees that teens perform better in school.
2. D. They've found that the later times let kids sleep more. They also have seen fewer car accidents, higher test scores and better graduation rates.
3. B. It emphasizes the positive outcomes of starting school later for teenagers.
4. D. To explore what the right amount of sleep is for teenagers.
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