If You Have Not Slept Enough Over Several Days, Which

If you have not slept enough over several days, which of the following is likely to happen when you do sleep?

A) You are likely to show an increase in REM sleep
B) You are likely to show a decrease in REM sleep but an increase in stage 3 and 4 sleep.
C) You will sleep less overall.
D) None of the above. There will be no change, as you will just resume your normal sleep patterns.