One of the signs that sleep is necessary is that all living creatures __________.
Aare harmed by lack of sleep
Bcan put off sleep for a time
Cavoid sleep as much as possible
Dcan sleep longer than necessary please select the best answer from the choices provided a b c d
Aare harmed by lack of sleep
Bcan put off sleep for a time
Cavoid sleep as much as possible
Dcan sleep longer than necessary please select the best answer from the choices provided a b c d