Which of the following is a common sign of appendicitis?

In cases of appendicitis, one of the hallmark signs is fever. This occurs as a part of the body's inflammatory response to the infection or irritation of the appendix. When the appendix becomes inflamed, it can lead to an increase in body temperature as the immune system works to fight off perceived threats, such as bacteria.

While diarrhea may occasionally occur, it is not a primary indicator of appendicitis. Hypertension is not typically associated with this condition; rather, the stress response can affect blood pressure variably. Bradycardia, or a slower than normal heart rate, is also not a common symptom in appendicitis and may suggest other medical conditions unrelated to this acute digestive issue. Therefore, fever is a more direct and common sign that aligns well with the clinical presentation of appendicitis.