The correct answer is D) confine to bed until helicopter arrives. When a patient is suspected of having appendicitis, the primary action is to confine them to bed and arrange for prompt medical evacuation, usually by helicopter. This is because appendicitis is a serious medical emergency that requires immediate surgical treatment. Giving the patient morphine, laxatives, or aspirin could potentially mask or worsen the condition, and should be avoided. The goal is to keep the patient still and stable until they can receive proper medical care.