Read the following passage and circle the letter A, B, C, or D to indicate the correct answer to each of the questions.

Sleep is very important for teenagers' health. When we sleep, our body grows, repairs itself, and gets ready for the next day. Getting enough sleep helps us think clearly, remember things better, and focus in class. It also helps us feel happier and reduces stress and mental problems.

Teenagers need about 8 to 10 hours of sleep each night, but many do not get enough. This can be because of schoolwork, after-school activities, and using electronic devices too much. Not getting enough sleep can cause problems such as poor attention, bad decisions, and more accidents. It can also lead to weight gain and make the body weaker, so teens can get sick more easily.

To sleep well, teens should go to bed at the same time every day, make their bedroom quiet and comfortable, avoid caffeine and electronic devices before bedtime, and relax before going to sleep.