Which is the correct sequence of events as a school bus driver prepares to stop to load or unload children?

When you meet an oncoming school bus displaying flashing amber lights, you must slow to a speed no faster than 20 mph and be prepared to stop. If its red lights are flashing or if its stop arm is out, you must come to a complete stop at least 15 feet from the bus. Remain stopped as long as the red lights flash or the stop arm is out.

• Amber lights flash at the top of the bus, the bus stops as red lights flash, a stop arm goes out, and the door opens for the school children.
• The bus driver activates red flashing lights at the top of the bus, then activates amber flashing lights when the children are unloaded or seated.
• A stop arm goes out, amber lights begin flashing, and the school bus stops to load or unload children.