"are treating a responsive 50-year-old man with a severe airway obstruction when he becomes unresponsive. after properly positioning the patient, you should"

Lower the patient to the floor, c all an ambulance immediately, then  begin CPR (even if a pulse is present in the unconscious choking victim).

Explanation: The airway may be stuck and need help re-opening the airway, therefore, seeking for help may be the best help and doing cpr to keep the persons heart going.

answerdesire to continue with your exercise;