A 38-year-old man with no known medical conditions collapses while playing football. He is unresponsive and not breathing normally. Bystanders call an ambulance. What is the most appropriate immediate action by a trained first aider on scene?ACheck carotid pulse for 60 seconds before actingBBegin chest compressions at a rate of 100-120/min and depth of 5-6 cmCGive two rescue breaths onlyDPlace the patient in the recovery position and wait for paramedicsEGive sternal rub for several minutesCheck my answer