A continuous white line on the carriageway, noticeably wider than in the general case...

A)is used to delimit bus lanes only.
B)indicates the edge of the carriageway.
C)indicates the existence of a special lane.Correct
A white line on the carriageway, continuous or broken, noticeably wider than in the general case, indicates the existence of a special lane. Not only bus lanes are special lanes. Apart from these special lanes reserved for certain vehicles, there are also special entry or exit lanes, for example on a motorway, or special lanes reserved for traffic depending on a set speed.