A nurse is caring for a client who is 3 hr postoperative following abdominal surgery. Which of the following assessment data should the nurse report to the provider?

A. A reduction in pain after pain medication is an expected outcome and does not require reporting to the provider. It indicates that pain management is effective. B. Normal urine output is approximately 0.5 to 1 mL/kg/hr. For an average adult, 50 mL over 3 hours is oliguria, which may indicate dehydration, decreased renal perfusion, or early postoperative complications. This finding should be reported promptly to the provider for assessment and possible intervention. C. Serosanguineous drainage (pink-tinged fluid) is typical in the early postoperative period and is considered a normal part of wound healing unless excessive in amount or accompanied by other signs of infection or bleeding. D. These values are within normal limits for adults and do not indicate a complication that needs immediate reporting.