Which type of handgun action fires all rounds in double action mode regardless of the user's hand position on the hammer?

The choice indicating double-action is correct because this mode allows the firearm to be fired with the trigger alone, regardless of the initial position of the hammer. In double-action handguns, pulling the trigger both cocks the hammer and releases it in a single motion, which means that the shooter does not need to manually position the hammer. This feature is especially critical in self-defense scenarios where speed and ease of use are paramount.

Unlike single-action firearms, which require the hammer to be cocked before the trigger can be pulled for firing, double-action systems ensure that the shooter can fire the weapon without any additional manipulation of the hammer. This design enhances the operational efficiency and safety for users who may not have the luxury of time to prepare the gun before using it. Double/single action refers to guns that can operate in both modes, and automatic generally refers to guns that automatically cycle the action but does not specifically address the triggering mechanism based on the hammer's position.