The Nurse Is Collecting Health Information from a Patient

The nurse is collecting health information from a patient. Which patient statement will cause the nurse the most concern?

A) "My stool has been dark green and hard to pass lately."
B) "Lately, I've had two or three loose, sticky, black stools every day."
C) "Usually I move my bowels every day and the stool is light brown."
D) "My stool is soft and dark brown; I usually move my bowels twice a day."