单选题 The nurse is interviewing a client about his medical history. Which preexisting condition may lead the nurse to suspect that a client has colorectal cancer?
A. Duodenal ulcers.
B. Hemorrhoids.
C. Weight gain.
D. Polyps.

【正确答案】 D

【答案解析】Colorectal polyps are common with colon cancer. Duodenal ulcers and hemorrhoids aren't a preexisting condition of colorectal cancer. Weight loss--not gain--is an indication of colorectal cancer.