What is a correct action in the event of brake failure?

Answer: D — All of the above

In the event of brake failure, taking multiple corrective actions is crucial for safely bringing the vehicle to a stop. The correct approach involves a series of steps that can be used in conjunction to effectively manage the situation. Downshifting to a lower gear can be beneficial as it allows the engine to assist in slowing down the vehicle. This process uses engine braking to help decelerate more gradually, which can prevent loss of control. Pumping the brakes is another important tactic, especially if the brakes are simply losing pressure rather than failing entirely. In some cases, pumping the brakes can help restore enough pressure to allow for limited braking capability. Using the parking brake serves as an additional measure for bringing the vehicle to a halt. If skidding occurs due to sudden application of the parking brake, releasing it can help regain traction. This method should be approached carefully to avoid further loss of control. Combining these actions increases the chances of safely stopping the vehicle during a brake failure scenario. Thus, considering all these techniques together reflects a comprehensive and prudent response to this serious situation.