An Elderly Client Has Constipation

An elderly client has constipation. He asks the nurse the reason for this. What is the best response by the nurse?

A) "You could have a serious illness and should check with your doctor."
B) "You probably drink too much alcohol and end up constipated."
C) "You probably don't eat enough fiber, so the stool stays in your intestine too long."
D) "Your large intestine is old and does not work as well as it used to."