Immediately after driving a passenger bus out of a flooded roadway or deep puddle, why and how must the driver perform 'brake drying' (制动器水湿恢复)?

1. Water on brake linings and drums drastically reduces friction; the driver must drive at low speed while repeatedly applying gentle brake pressure to generate frictional heat and dry the brake linings
2. The driver must immediately accelerate to 100 km/h to let wind blast the water off the wheels
3. The driver must stop the bus, turn off the engine, and wait 2 hours for air drying
4. The driver must spray compressed air directly into the brake drums using the emergency tire inflation hose