Correct Answer: C

Rationale: Radiation therapy is commonly used for rectal cancer to shrink the tumor before surgery, which is not typically done for colon cancer.

Correct Answer: C

Rationale: The correct answer is C: 'Inflammation of the gastric mucosa.' Gastritis is characterized by inflammation of the stomach lining, specifically the gastric mucosa. This inflammation can be caused by various factors such as infections, medications, alcohol, or autoimmune diseases. Choice A, 'Erosion of the gastric mucosa,' is incorrect because erosion refers to the wearing away of tissue rather than inflammation. Choice B, 'Inflammation of a diverticulum,' is incorrect because gastritis specifically involves inflammation of the stomach lining, not a diverticulum. Choice D, 'Reflux of stomach acid into the esophagus,' describes gastroesophageal reflux disease (GERD), which is different from gastritis.

Correct Answer: A

Rationale: A Kock pouch is a type of continent ileostomy that requires catheterization to empty the internal reservoir. Understanding the need for regular catheterization indicates the client comprehends the procedure.

Correct Answer: B

Rationale: Ulcerative colitis is believed to be caused by an altered immune response in the gastrointestinal tract.

Correct Answer: D

Rationale: Ulcerative colitis is a condition closely associated with an increased risk of developing colon cancer due to chronic inflammation of the colon.