What is the first step in the ABCs of evaluating an injury?

The first step in the ABCs of evaluating an injury involves checking the airway. This is crucial because an open and clear airway is essential for effective breathing and circulation. If the airway is blocked or compromised, the individual cannot receive the oxygen necessary for vital bodily functions, rendering any subsequent assessment of breathing and circulation irrelevant. Therefore, securing the airway is prioritized to ensure that the person can breathe, as this directly impacts their chances of survival or recovery. Once the airway is confirmed to be clear, the next steps involve assessing breathing and circulation.