How much sleep do adults need each night, according to the National Sleep Foundation?

Your answer is correct

Oops! you choose the wrong answer.

None of the selected answer is correct. You choose {{TotalAttempted.totalAttempted}} answers and {{TotalAttempted.totalCorrect}} is correct. You choose {{TotalAttempted.totalAttempted}} answers and {{TotalAttempted.totalCorrect}} are correct.

You've not selected any answer.