Which Action by a New Registered Nurse (RN)who Is Orienting

Which action by a new registered nurse (RN) who is orienting to the progressive care unit indicates a good understanding of the treatment of cardiac dysrhythmias?

A) Injects IV adenosine (Adenocard) over 2 seconds to a patient with supraventricular tachycardia
B) Obtains the defibrillator and quickly brings it to the bedside of a patient whose monitor shows asystole
C) Turns the synchronizer switch to the "on" position before defibrillating a patient with ventricular fibrillation
D) Gives the prescribed dose of diltiazem (Cardizem) to a patient with new-onset type II second degree AV block