How should drivers conduct themselves while driving opposite one another in a narrow and flat road?

1. A The driver of the bigger vehicle shall increase his speed and pass the narrow part first.
2. B According to the accepted conduct in that road.
3. C The driver of the bigger vehicle shall stop and allow the other vehicle to continue driving through the narrow part.
4. D Slow down and divert their vehicle to the roadway’s edge, , to avoid collision.