You and your partner arrive at the side of a 60-year-old woman who collapsed about 7 minutes ago. She is unresponsive, apneic, and pulseless. You should: Select one: a. begin CPR at a compression to ventilation ratio of 15:2. b. apply the AED if there is no response after 10 cycles of CPR. c. begin CPR and apply the AED as soon as it is available. d. immediately apply the AED and analyze her cardiac rhythm.
