Gilbert Has Been on the Day Shift for Five Years

Multiple Choice

Gilbert has been on the day shift for five years. He will be working on the night shift in three weeks. Which of the following would be the BEST advice to help Gilbert deal with this change?

A) Take over-the-counter stimulants for the first month or so.
B) Use over-the-counter sleeping pills to help go to sleep during the day.
C) Take three naps rather than sleep a full eight hours during the day.
D) Begin now to gradually preadapt sleep-waking time to match the upcoming new shift.