The average adult needs about 8 hours of sleep each night. When should teens go to bed relative to adults if they wake up at the same time?

Teens generally need about 9–10 hours of sleep each night, compared with about 8 hours for adults. If teens and adults wake at the same time, teens need to go to bed about 1–2 hours earlier to get enough sleep. So the correct choice is “1 to 2 hours earlier.”

AI-written and checked against the verified answer.