A 20-year-old male presents to the emergency department with acute right lower quadrant (RLQ) abdominal pain, nausea, and fever. During the physical examination, the nurse performs an assessment to evaluate for appendicitis. Which of the following findings would be most indicative of appendicitis?

Rationale: A. Dull pain in the left upper quadrant is incorrect because appendicitis pain typically begins as periumbilical pain and then localizes to the right lower quadrant, not the left upper quadrant. B. Hyperactive bowel sounds throughout the abdomen are not characteristic of appendicitis. Bowel sounds may actually be decreased or normal; hyperactivity is more commonly associated with gastroenteritis or early bowel obstruction. C. Pain relief when the right leg is flexed is incorrect. The psoas sign involves pain with extension of the right leg, not relief with flexion. Pain relief with leg flexion is not a reliable indicator of appendicitis. D. Rebound tenderness at McBurney's point is correct because McBurney’s point is located one-third of the distance from the anterior superior iliac spine to the umbilicus on the right lower quadrant. Rebound tenderness occurs when pressure is applied to the abdomen and then released, causing increased pain. This is a classic and reliable physical finding indicative of localized peritoneal irritation due to appendiceal inflammation.