Catherine Has Had Difficulty Sleeping for Years, but It Has

Catherine has had difficulty sleeping for years, but it has gotten worse since she started college. She frequently finds herself getting tired in the middle of the day, but at night she has trouble getting to sleep. What can Catherine do to help regulate her sleep schedule?

A) Take a forty-five-minute nap in the middle of the day.
B) Listen to dance music before going to bed.
C) Stick to a regular schedule for going to bed and getting up.
D) Sleep in a different room every few nights.