Correct Answer: C

Rationale: Decrease in body weight is not a direct result of antibiotic therapy but may occur due to the underlying disease process.

Correct Answer: A

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

Correct Answer: C

Rationale: Crohn's disease is believed to have a hereditary link, with genetic factors playing a significant role in its development.

Correct Answer: C

Rationale: Medical management of diverticulitis typically includes the administration of antibiotics to treat infection and inflammation.

Correct Answer: A

Rationale: Adenomatous polyps are a known risk factor for the development of rectal cancer.