Why should the bus door stay closed until the driver is completely ready to pull away from a stop?

Pick an answer

1. It only affects the temperature inside the bus
2. It has no real safety purpose beyond comfort
3. A door that's open or only partly closed could let a student try to exit late or someone approach a bus about to move
4. It is a rule that applies only during the winter months, when cold air coming through the door would bother students

Correct!

Not quite. The correct answer is highlighted.