During the initial assessment of an adult patient in cardiopulmonary arrest, what is the best next step after calling for help and confirming the absence of pulse and breathing?
Assess for potential airway obstruction before starting chest compressions.
Attach the automated external defibrillator (AED) and immediately deliver a shock.
Administer two rescue breaths before any chest compressions.
Begin high-quality chest compressions at a rate of 100-120 per minute.