What must you do when approaching a school bus that is picking up or dropping off passengers?

Answer: B — Come to a complete stop

When approaching a school bus that is picking up or dropping off passengers, it is essential to come to a complete stop. This requirement is in place to ensure the safety of children as they board or disembark from the bus. School buses are equipped with flashing lights and an extended stop sign that indicate when they are loading or unloading students. By stopping, drivers allow children to cross the street safely and minimize the risk of accidents. Failure to stop can lead to serious penalties and hazards for helpless children who may be in the vicinity. Therefore, this rule is strictly enforced to protect some of the most vulnerable users of the road.