Final answer:
In this scenario, the correct action to take is to roll the patient onto his side to clear the airway.
Step-by-step explanation:
In this scenario, the patient is breathing shallowly and has a palpable radial pulse but is choking due to vomiting. The correct action to take in this situation is to A. roll him over onto his side to clear the airway and prevent further obstruction. By rolling the patient onto their side, you can help clear the airway and allow the vomit to drain out, reducing the risk of choking.