After Your University Got a New PET Scanner, You Decide

After your university got a new PET scanner, you decide you want to do a PET scan study to confirm earlier research about how brain activity during REM sleep differs from brain activity during wakefulness. The results of your study reconfirm the earlier research and show that:

A) REM sleep involves decreased activity in the frontal lobes and primary visual cortex as compared to wakefulness.
B) brain activity during REM sleep is virtually identical to brain activity during wakefulness.
C) REM sleep involves increased activity in the frontal lobes and primary visual cortex as compared to wakefulness.
D) with the exception of brain areas that control heartbeats and breathing, almost all of the brain is deactivated during REM sleep as compared to wakefulness.