What must you do when you see a school bus with its red lights flashing?

Answer: B — Stop at least 25 feet away

When you see a school bus with its red lights flashing, stopping at least 25 feet away is the required action. This rule is in place to ensure the safety of children boarding or exiting the bus. The flashing red lights indicate that the bus has stopped to pick up or drop off students, and that all vehicles in both directions must come to a complete stop until the lights are no longer flashing and it is safe to proceed. This law helps protect young pedestrians who may unexpectedly step into the roadway, promoting a safer environment around school buses. Being attentive and adhering to this rule significantly reduces the risk of accidents involving children in these situations.