Задание

Read the short text. Read the question and choose the correct answer.

Your lack of sleep can affect growth and your immune system. You can become sick more easily, and it takes longer to heal from a cold, flu, injuries and other illnesses. Though scientists don't completely understand everything about sleep, they think that most people have typical sleep which includes four stages or cycles of normal sleep.

Which statement is false, according to the text?

Your lack of sleep is able to boost your immune system.

Scientists haven't explored all of the properties of sleep.

Your lack of sleep is able to recover slowly.

Typical sleep has four stages.