You receive a call to a local daycare center for a 3-year old boy who is not breathing. When you arrive and assess the child, you find him to be in cardiopulmonary arrest. You initiate CPR and request a back-up ambulance. After attaching the AED, you push the analyze button and receive a shock advised message. After delivering the shock, you should
A. assess for a carotid pulse
B. immediately perform CPR
C. reanalyze the cardiac rhythm
D. open the airway and ventilate