The nurse assesses a young adult female who was brought to the emergency department (ED) by her boyfriend because she has not been feeling well all day and he believes she is getting worse. Which finding supports the nurse's suspicion that the client is experiencing appendicitis?

A. Diffuse abdominal pain with elevated neutrophil count. Diffuse abdominal pain is not specific to appendicitis, as it can be seen in various infections or inflammatory conditions. Although an elevated neutrophil count suggests infection, it does not confirm appendicitis without the characteristic pain progression. B. Anorexia progressing to nausea, vomiting, and fever. These symptoms are commonly associated with appendicitis but are nonspecific and can be seen in other gastrointestinal conditions. While they support the diagnosis, the hallmark feature is the pain migrating to the right lower quadrant. C. Periumbilical pain localizing to right lower quadrant. This is the classic presentation of appendicitis. The pain typically begins near the umbilicus and then shifts to the right lower quadrant (McBurney’s point) as the inflammation progresses. This pattern strongly indicates appendicitis. D. Sudden onset of severe anxiety, fear, and concern. Anxiety and fear are not primary symptoms of appendicitis. While pain and discomfort can cause distress, emotional symptoms alone do not indicate an acute abdominal condition.