One important way to reduce the incidence of decubitus ulcers is to.. change position every 2 hours

One important way to reduce the incidence of decubitus ulcers is to:
a. keep the patient in bed
b. force fluids every 2 hours
c. change position every 2 hours
d. all of the above

Answer c.
 Changing the patient's position every 2 hours prevents bedsores.