This sign indicates...
A)the proximity of a change of direction.
B)the proximity of an exit on a conventional road.
C)that the next exit is 300 metres away.Correct
The sign indicates on a motorway, dual carriageway, or road for motor vehicles that approximately 300 metres ahead there is an exit on the right, since the diagonal lines ascend from left to right. Furthermore, the sign will be located on the right side of the carriageway.
If the exit were on the left, the diagonal lines would descend toward the right, as in the first sign shown below:
If the exit were on the left, the diagonal lines would descend toward the right, as in the first sign shown below: