An officer finds an unresponsive person in a hallway. The first action under standard BSIS emergency procedures is:

Explanation

Standard emergency-response sequence is scene safety first (the officer is no help if they become a second casualty), then call 911 (or direct a specific person to call), then assess responsiveness and breathing, then provide care within trained scope (CPR, AED, bleeding control). Compressions before assessment (a) wastes effort if the person is breathing; moving the patient (b) risks aggravating spinal or other injuries; waiting passively (d) costs critical minutes in cardiac arrest, where survival drops roughly 10% per minute without intervention.