You are attending to an adult who has fallen off a ladder from the roof of a nearby house. She is unresponsive, does not appear to be breathing, and has no palpable carotid pulse. To open the airway to give rescue breaths during CPR you should:
a) Use the jaw thrust maneuver
b) Perform chest compressions only
c) Tilt the head backward
d) Check for foreign objects in the mouth