What is the main function of anti-lock braking systems (ABS)?

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

The main function of anti-lock braking systems (ABS) is to prevent wheel lock-up during hard braking. This technology allows the driver to maintain steering control while applying maximum braking force. When a driver engages the brakes forcefully, ABS automatically modulates brake pressure to prevent the wheels from locking up, which can occur in normal braking situations without ABS. By maintaining traction, ABS significantly reduces the likelihood of skidding and helps the driver steer the vehicle more effectively in emergency situations. This function is crucial for maintaining vehicle control during sudden stops and can contribute to accident avoidance. While fuel efficiency, steering assistance, and improved acceleration are important aspects of vehicle performance, they are not the primary functions of ABS.