When joining a motorway via the acceleration lane, you must...

A)reduce speed and stop at the end of the lane, without exception.
B)accelerate to reach exactly 120 km/h at the end of the lane, without exception.
C)accelerate to reach the appropriate speed at the end of the lane.Correct
On roads equipped with an acceleration lane, a driver intending to use it to join the carriageway must ensure at the beginning of that lane that they can do so without danger to other users travelling on that carriageway, taking into account their position, trajectory and speed, and even stopping if necessary. They must then accelerate to reach the appropriate speed at the end of the acceleration lane in order to merge into the flow of traffic on the carriageway.