A passenger stands in the front doorway zone, blocking the driver's view of the left-side mirror. What should the driver do?

1. Shout at them to move to the back of the bus immediately
2. Politely request the passenger to step behind the yellow line for safety and to keep the mirror view clear
3. Stop the bus in the traffic lane and refuse to drive until they move
4. Ignore it and try to lean forward to see the mirror