Which of the Following Pieces of Evidence Is Most Consistent

Multiple Choice

Which of the following pieces of evidence is most consistent with evolutionary/circadian models of sleep?

A) A rat in a maze shows more REM sleep at night while mastering a new maze.
B) A species of mouse that has lots of predators in its environment sleeps mostly during the day.
C) A person deprived of slow-wave sleep at night performs poorly on a cognitive task the next day.
D) Dogs who lack adenosine sleep almost constantly.