How is a driver required to conduct himself when intending to overtake a school transport bus that stopped to pick-up and let down children?

1. Overtake the bus quickly, according to the customary overtaking stages.
2. Stop behind the bus and then overtake it.
3. Correct answer: Slow down and be prepared to stop.
4. Honk continuously and overtake.

WhyIf a bus with children is stopped to let them on or off, slow down, stop if needed and then pass slowly. You do not have to wait until it leaves.