What component of the antiskid system allows for full braking action during taxiing and parking?

The correct answer highlights that the locked-wheel arming circuit is specifically designed to be inoperative at taxi speeds, which allows for the full braking action needed during taxiing and parking. This is essential because, during these phases of operation, the aircraft requires maximum brake efficiency to ensure control and safety at lower speeds, where the risks of wheel lock-up could lead to unwanted directional control issues.

By being inactive at taxi speeds, the locked-wheel arming circuit prevents the antiskid system from interfering with the brakes' maximum effectiveness when needed—such as bringing the aircraft to a halt adequately. Once the aircraft reaches a certain speed, the antiskid system can engage to prevent wheel lock-up during landing, but during taxiing and parking, the priority is on maximizing braking force.

In contrast, the other options relate to different functions within the braking system that do not specifically address the need for full braking efficiency at parking and taxi speeds. The brake pedal engagement switch activates the brakes, while the brake pressure release valve modulates brake pressure and the anti-skid control module manages the overall functionality of the antiskid system. However, none directly relate to ensuring full brake action specifically during the lower speed operations essential for safety on the ground.