What is the proper procedure for safely unloading children from a school bus?

Answer: B — Ensure traffic is stopped, open the door, and signal children to exit one at a time

The proper procedure for safely unloading children from a school bus involves a series of critical steps to ensure their safety. The correct choice emphasizes the importance of ensuring that traffic is stopped before opening the bus door. This is crucial because it protects children from any oncoming vehicles that may pose a danger as they leave the bus. Once the door is opened and traffic has been halted, it is essential to signal children to exit one at a time. This controlled approach minimizes chaos and allows the driver to monitor the situation more effectively. By exiting in an orderly fashion, children are less likely to rush into traffic, increasing their safety as they move away from the bus. The other choices do not prioritize safety in the same way. For instance, simply letting children exit freely does not take into consideration the surrounding traffic, which could lead to dangerous situations. Exiting immediately when the driver opens the door disregards the necessity of ensuring that the area is safe. Allowing children to exit only when there are no cars nearby might imply waiting for a longer period without a proper signal or traffic management, which could be impractical and unsafe. Thus, option B stands out as the most responsible and effective procedure for school bus unloading safety.