You and your partner arrive at the scene of a middle aged man who collapsed about 5 minutes ago. he is unresponsive, apneic and pulseless. Bystanders are present, but have not provided any care. You should:
a. have your partner perform CPR which you question the bystanders
b. begin high quality CPR and apply the AED without delay
c. immediately apply the AED pads and analyze his cardiac rhythm
d. perform 2 rescuer CPR for 5 minutes and request ALS backup