Use the Following to Answer Questions

Multiple Choice

Use the following to answer questions :
Refer to the figure below.

-Which conclusion about sleep is most consistent with the data shown?

A) Our brains are generally very active during all stages of sleep.
B) It is normal to experience about five bouts of REM sleep during the night.
C) It is easiest to rouse someone from stage 4 sleep.
D) We spend the majority of our sleep hours in stage 3 sleep.