What is the first step to take when using an AED?

The correct choice highlights the importance of quickly activating the automated external defibrillator (AED) and preparing it for use. Turning on the AED and attaching the pads allows for immediate assessment of the victim’s heart rhythm and readiness to deliver a shock if necessary. This step is crucial because AEDs are designed to analyze the heart's activity and provide auditory and visual instructions for the rescuer.

While ensuring the area is clear of water is a vital safety consideration, it comes after activating the AED. Checking for a pulse or performing CPR can happen after the AED is activated, but the first priority is to get the device operational. This approach helps maximize the chances of survival by ensuring that the AED is ready to function as quickly as possible.