We may infer that the author is most probably a ______.

A．you stay up too late
B．you get up too early in the morning
C．you take sleeping pills
D．you wake up too frequently at night

A．You mustn't take sleeping pills in order to get a good night' s sleep.
B．You should stay up if you want to sleep effectively.
C．Food is necessary at night if you fail to go to sleep.
D．It is very important to get out of the habit of taking a nap after dinner.