A nurse is collecting data from a client who is 2 days postoperative following abdominal surgery. Which of the following findings is a manifestation that can indicate an infection?

A. Pain rating of 4 on a scale of 0 to 10: Mild to moderate pain is expected in the early postoperative period due to surgical trauma. While pain should be monitored, a rating of 4 is not specific for infection and can be considered within normal postoperative discomfort. B. Temperature of 37.2° C (99.0°F): A slightly elevated temperature within the normal range is common after surgery due to inflammatory response. It does not necessarily indicate infection unless it continues to rise or is accompanied by other systemic signs. C. Increased urinary output: Increased urine output is generally a positive sign of adequate renal perfusion and fluid balance. It is not indicative of infection and may instead reflect normal postoperative recovery or fluid administration. D. Elevated WBC count: Leukocytosis is a key laboratory indicator of infection. An elevated white blood cell count suggests an inflammatory or infectious process, which is particularly concerning in the postoperative period and warrants further assessment and intervention.