You Have Studied a Fair Amount for an Important Test

You have studied a fair amount for an important test tomorrow but are considering pulling an all-nighter so that you can really be prepared. According to the research on sleep deprivation, the best thing to do would be to since students who stay up

A) go to bed and sleep; do better
B) stay up all night studying; do worse
C) go to bed and sleep; do worse
D) stay up all night studying; do better