The male client had abdominal surgery and the nurse suspects the client has peritonitis. Which assessment data support the diagnosis of peritonitis?

D Hard, rigid abdomen and white blood cell count 22,000/mm3. B Abdominal cramping and hemoglobin of 14 g/dL. C Profuse diarrhea and stool specimen shows Campylobacter. A Absent bowel sounds and potassium level of 3.9 mEq/L.