How does an Anti-lock Braking System (ABS) assist a coach driver during an emergency stop on a wet highway?

1. It guarantees the shortest possible stopping distance on every surface
2. It applies the parking brake whenever wheel slip is detected
3. It takes over steering and automatically selects an obstacle-free path
4. It rapidly modulates brake pressure to prevent sustained wheel lock, helping the driver retain steering control and directional stability during hard braking