While Serving as a Subject in a Laboratory Sleep Study

While serving as a subject in a laboratory sleep study for several nights,Corvel was awakened whenever he entered REM sleep.As the number of nights in the study increased,what would happen to Corvel

A)  He would enter REM sleep less frequently. 
B)  He would enter REM sleep more and more frequently. 
C)  He would increase the total number of hours he slept each night. 
D)  He would reduce the total number of hours he slept each night.