What is an anti-lock braking system (ABS) used for?

Answer: B — To prevent wheel lock-up during hard braking

An anti-lock braking system (ABS) is specifically designed to prevent wheel lock-up during hard braking. When a driver brakes aggressively, especially on slippery surfaces, there's a risk that the wheels can lock up, causing a loss of traction and control. ABS works by automatically modulating brake pressure to ensure that the wheels keep turning while braking is engaged. This process allows the driver to maintain steering control while slowing down, which is critical for avoiding skids and collisions. The primary function of ABS is to enhance vehicle control during emergency braking situations, which ultimately contributes to overall safety. While it may indirectly affect other aspects such as stopping time and tire wear, its primary purpose and functionality focus on maintaining wheel rotation and preventing lock-up during braking.