A nurse is monitoring a child for manifestations of hemorrhage following a tonsillectomy. Which of the following findings is a manifestation of this postoperative complication?

The correct answer is B: Frequent swallowing. Post-tonsillectomy hemorrhage can lead to blood accumulating in the throat, causing the child to swallow frequently. This manifestation indicates active bleeding and the need for immediate medical intervention. Reports of thirst (A) may be due to dryness post-surgery but do not directly indicate hemorrhage. Mouth breathing (C) is a common post-tonsillectomy behavior due to nasal congestion from swelling, not hemorrhage. Reports of pain (D) are expected after surgery but do not specifically point to hemorrhage.