At this intersection, drivers are required to stop...
A)next to the stop sign.
B)immediately after the transverse line.
C)before the transverse line, without crossing it.Correct
The vertical STOP sign in the question indicates the obligation for every driver to stop their vehicle before the next stop line or, if there is none, immediately before the intersection, and to yield to vehicles travelling on the road they are approaching.
If, due to exceptional circumstances, there is insufficient visibility from the point where the stop was made, the driver must stop again at a place where they have visibility, without endangering any road user.