What must you remember when passengers are boarding and alighting?

Your choice is correct. When passengers are boarding and leaving the bus, you are only allowed to activate the enabling device for automatic doors once the bus has come to a complete stop, ensuring passenger safety. Additionally, you always need to supervise all doors that you open and close directly to prevent accidents or someone getting caught. However, you must never set off while an indicator shows a door is open, so starting the bus when the indicator is still lit is not allowed. These rules are important because they prevent injuries and ensure everyone boards and leaves the vehicle safely.