The correct answer is D) Turn the patient's body to the side, sweep out the mouth and resume CPR. This is the correct procedure because if vomiting occurs during a resuscitation effort, it is important to quickly clear the airway to prevent aspiration, which could further compromise the patient's breathing and circulation. Turning the patient to the side allows the vomit to drain out of the mouth, and sweeping out the mouth removes any remaining material, enabling the rescuer to resume effective chest compressions and ventilation. The other options are incorrect because they do not address the immediate need to clear the airway. Ignoring the vomiting (option A) or simply switching to mouth-to-mouth ventilation (option B) without clearing the airway first could lead to further complications. Pausing until the patient appears quiet again (option C) also risks delaying critical resuscitation efforts.