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

WhyIt is unclear what the drivers ahead will do. The truck should slow down and stop if needed until their intentions are clear.