Passengers should get on or off a vehicle...

A)on the roadway side.
B)on the side closest to the edge of the road.Correct
C)always on the right side.
Once immobilized, users must enter or exit the vehicle, as a general rule, on the side closest to the sidewalk or shoulder.
On one-way urban roads, you can stop and park on both sides of the road, so we will always try to exit the vehicle on the side where there is less danger of being run over, which will be the side closest to the edge of the road and not on the side of the roadway, which is where vehicles travel.