What should you do upon approaching a school bus that is stopped with its lights flashing?

Answer: B — Stop your vehicle

When you approach a school bus that is stopped with its lights flashing, the correct response is to stop your vehicle. This rule is in place to protect the safety of children who may be getting on or off the bus. The flashing lights indicate that the bus is actively loading or unloading students, and stopping is essential to provide a safe environment for them. Failing to stop can endanger children who might unexpectedly cross the street, as they may not be fully visible to drivers. Additionally, laws in Massachusetts and many other states impose significant penalties for passing a stopped school bus, reinforcing the importance of adhering to this rule.