In Order for Sleep to Benefit Your Memory, ____

In order for sleep to benefit your memory, ____.

A) the information you want to remember must be well-encoded before you go to sleep
B) your sleep must not consist of long periods of deep sleep
C) you should clear your mind and not do any strenuous mental work for at least an hour before bed
D) the amount of sleep you get should not exceed more than five or six hours