What should a bus driver do when the bus door is open?

Answer: C — Remain vigilant and watch for passengers

When the bus door is open, it is essential for the bus driver to remain vigilant and watch for passengers. This action ensures that the driver is attentive to the safety of individuals entering or exiting the bus. By observing the area around the bus, the driver can assess whether it is safe for passengers to board or disembark and can respond quickly to any potential hazards, such as nearby vehicles or pedestrians. This level of awareness helps prevent accidents and ensures a safe environment for all riders. While there may be considerations for closing the door or ignoring it altogether in certain circumstances, staying focused on passenger activity and surroundings is crucial for maintaining safety on the bus. The other options suggest actions that could compromise the safety of both the passengers and the bus itself.