The red vehicle is stopped on the passable shoulder of this road. Is it doing so correctly?

A)Yes, because it is stopped. It would not be correct if it were parked.
B)No, on the passable part of the shoulder you may neither stop nor park.Correct
C)Yes, on the shoulder you may stop and park as long as you do not obstruct.
On the passable shoulder of a road outside a built-up area, we may neither stop nor park. We could do so off the passable part of it.
We may use it for a halt (detención), which is an involuntary immobilisation (breakdown, illness, etc.).
We may use it for a halt (detención), which is an involuntary immobilisation (breakdown, illness, etc.).