Correct Answer: A

Rationale: A low-fiber, high-fat diet is most commonly associated with an increased risk of colon cancer.

Correct Answer: D

Rationale: The correct answer is D. Undigested food blocking the diverticulum can lead to bacterial invasion, causing inflammation and turning diverticulosis into diverticulitis. Choices A, B, and C do not directly facilitate the development of diverticulitis. Choice A involves a different mechanism related to laxative use, choice B describes a complication of chronic constipation but does not necessarily lead to diverticulitis, and choice C refers to a different condition involving herniation of the intestinal mucosa.

Correct Answer: A

Rationale: Lying supine with the legs straight can increase abdominal tension and exacerbate pain. The client should be advised to lie with the legs bent to reduce muscle tension and discomfort.

Correct Answer: B

Rationale: Diarrhea is a common stool characteristic in clients with Crohn's disease due to inflammation of the gastrointestinal tract.

Correct Answer: B

Rationale: Tap water at body temperature is generally used for colostomy irrigation unless the local water supply is not safe for drinking, in which case bottled water can be used.