Correct Answer: A

Rationale: The correct answer is A: increasing fluid intake to prevent dehydration. An ileostomy typically drains liquid waste, so the client is at risk of fluid loss. By increasing fluid intake, the client can prevent dehydration. It's essential for the client to wear a collection appliance at all times because ileostomy drainage is incontinent. Consuming a low-protein, high-fiber diet is not recommended as high-fiber foods can cause intestinal irritation. Enteric-coated medications should be avoided because they may not be absorbed properly after an ileostomy.

Correct Answer: C

Rationale: A barium swallow is a diagnostic test that can visualize the esophagus, stomach, and small intestine to diagnose a hiatal hernia.

Correct Answer: D

Rationale: Pain on an empty stomach is characteristic of a duodenal ulcer, while pain on eating is characteristic of a gastric ulcer.

Correct Answer: B

Rationale: Eating a low-fat, low-cholesterol diet is most important for preventing cholecystitis.

Correct Answer: A

Rationale: Cimetidine (Tagamet) works by reducing stomach acid production, which helps to manage peptic ulcer disease.