A nurse is assessing a child who is postoperative following a tonsillectomy. Which of the following findings should the nurse identify as the priority?

The correct answer is C: Frequent swallowing. This finding is the priority because it could indicate bleeding after a tonsillectomy, which is a potential complication requiring immediate intervention to prevent further complications like hemorrhage. Blood-tinged mucus (B) and dark brown emesis (D) are concerning but not as urgent as frequent swallowing. A sore throat (A) is expected postoperatively and can be managed with pain medication. Other choices are not provided but would likely be less critical than monitoring for bleeding.