A 4-year-old boy was electrocuted when he stuck a pin into an electrical outlet. You arrive at the scene and assess the child, who is motionless and is not breathing. A responding ambulance is approximately 5 minutes away. The MOST appropriate assessment and treatment sequence for this child consists of:
a) opening the airway, delivering two rescue breaths, assessing for a brachial pulse, and performing 15 chest compressions
b) opening the airway, delivering two rescue breaths, assessing for a carotid pulse, and performing 30 chest compressions
c) assessing for a carotid pulse, performing 30 chest compressions, opening the airway, and delivering two rescue breaths
d) assessing for a brachial pulse, performing 30 chest compressions, opening the airway, and delivering two rescue breaths