Correct Answer: C

Rationale: A perforated ulcer is most likely to directly cause peritonitis due to the leakage of gastric contents into the peritoneal cavity.

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: 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: D

Rationale: During the initial recovery period from ostomy surgery, skin care is the first priority to prevent irritation and infection around the stoma site.

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.