As a general rule, signs apply...

As a general rule, signs apply...
A)to the entire road.
B)to the right-hand lane only.
C)to the full width of the carriageway.Correct
Every sign shall apply to the full width of the carriageway that the drivers to whom the sign is directed are authorised to use.
However, its application may be limited to one or more lanes by means of road markings.