Read the paragraph. High school students are busy juggling responsibilities and fun. They often go to bed late and wake up early. This is a mistake because teenagers need about nine hours of sleep each night. Sleep strengthens every part of the body, including the brain and muscles. Students who get enough sleep have better memories and healthier bodies. Without sleep, young people are distracted and are more likely to have accidents.

What detail explains the benefits of sleep?

High school students have busy lives.
Students often get less sleep than needed.
Sleep strengthens the brain and muscles.
Sleepy, distracted people have accidents.