A nurse is assessing a preschool-age child who is in the immediate postoperative period following a tonsillectomy. Which of the following assessment findings is the priority?

A. Refusing clear liquids is common after surgery, but it is not the most concerning finding. B. Crying is a normal response for a child in the immediate postoperative period and is not as urgent as frequent swallowing. C. Frequent swallowing after a tonsillectomy can indicate bleeding, which is a serious complication that needs immediate attention. D. Increased throat pain can be expected after surgery and is typically managed with analgesics, so it is not a priority.