Two or several lanes:if the carriageway has two or several lanes in the same direction and there is heavy queue formation in all lanes,
Divided into lanes for different destinations: if the carriageway is divided into lanes for different destinations that are marked with lane assignment signs, or
Vehicles were in separate lanes:if the vehicles were in separate lanes in conjunction with a junction.

Driver license handbook

Thus car B is following point number 3 "Vehicles were in separate lanes"