What does a school bus stop sign indicate about the driver's actions?

The school bus stop sign indicates that drivers must come to a complete stop when the sign is extended, ensuring the safety of children getting on or off the bus. The correct response emphasizes that vehicles must remain stopped until the stop sign is retracted. This rule is in place to protect children in the vicinity of the bus, as they may be crossing the street or moving close to traffic. It reflects the law that prioritizes the safety of young pedestrians, preventing any vehicles from proceeding until it is clear to do so. This helps in reducing the risk of accidents in areas where children are frequently present.