Why is it important to stop at a safe distance behind a school bus with flashing lights?

• To allow children to board or exit the bus without stress
• To enable the bus driver to assist children safely
• Both A and B
• So that drivers behind you can see the flashing lights and students crossing the road
  Explanation:

  "Stopping at a safe distance (about 20 metres) behind a school bus ensures that drivers behind you can clearly see the bus's flashing lights and any children crossing the road. "