What action should you take when performing stab braking?

When performing stab braking, the correct action is to brake hard and then release the brakes until the vehicle slows down. This method is specifically used in situations where a quick stop is necessary, such as on slippery surfaces. The initial hard application of the brakes causes the weight to shift forward, which creates more traction on the front tires, allowing for better control during braking.

Once the vehicle starts to slow down, releasing the brakes allows the wheels to continue turning, avoiding wheel lockup and maintaining vehicle control. This technique is particularly effective in emergencies where quick action is needed, ensuring that the driver can stop the vehicle safely without skidding.

The other choices do not align with the principles of stab braking. Applying brakes gently and consistently might not provide the necessary stopping power in urgent situations. Engaging the parking brake while in motion is not recommended as it could lead to loss of control. Slowly easing off the accelerator does not utilize the benefits of braking effectively in a critical scenario.