While Serving as a Subject in a Laboratory Sleep Study

While serving as a subject in a laboratory sleep study for several nights,Steve was awakened whenever he entered slow-wave sleep.When first allowed an uninterrupted night's sleep,what would Steve do

A)  sleep for a longer amount of time than normal 
B)  spend less time in slow-wave sleep than normal 
C)  sleep for a shorter amount of time than normal 
D)  spend more time in slow-wave sleep than normal