In the following picture, the response of the drivers to the vehicle that comes out of parking is unclear. How is the truck driver required to respond to this situation?

1. A Slow down and stop if necessary, to verify that the drivers in front of him conduct themselves safely.
2. B Stop his vehicle and allow the other vehicle to continue driving.
3. C Continue driving and ignore the other exiting vehicle, because the truck has right of passage.
4. D Continue driving while honking continuously to alert about an approaching truck.