Anurse is caring for a client with constipation. the incidence of constipation tends to be high among clients that follow which diet?

The incidence of constipation is high among patients who follow diet which lack fruits and vegetables. 
Constipation is a medical condition in which the patient find it hard to empty the bowel as a result of hardened feces.
The condition can be alleviated by drinking much water and by eating fruits and vegetables.