When you encounter a school bus with flashing lights and a stop sign extended, what must you do?

Answer: B — Stop your vehicle until the lights are off

When you encounter a school bus with its flashing lights on and the stop sign extended, you must stop your vehicle until the lights are turned off. This rule is in place to ensure the safety of children who may be getting on or off the bus. The flashing lights and extended stop sign indicate that the bus is loading or unloading passengers, and it is crucial to stop your vehicle to allow these children to cross the street safely. Failure to stop can result in significant penalties, as it endangers the lives of vulnerable school children. Therefore, it is essential to adhere to this law to prevent accidents and ensure the safety of all road users.