After analyzing a cardiac arrest patient's heart rhythm, the AED provides a Deliver Shock message. After clearing the patient, the EMT's next step should be to:
a. press the shock button, and then check for the return of a pulse.
b. press the shock button, and then perform CPR for two minutes.
c. check for a pulse, and then press the shock button if a pulse is not present.
d. press the shock button, and then allow the AED to analyze the heart rhythm.
Answer: B