What is the purpose of an acceleration lane?

What is the purpose of an acceleration lane?
A)To merge onto the road slowly.
B)To reach 120 km/h before merging onto the road.
C)To merge onto the road at a speed appropriate to the traffic conditions.Correct
The function of an acceleration lane, as its name indicates, is to provide a stretch of sufficient length to be able to accelerate in this lane and merge onto the main road at a speed appropriate to the traffic conditions.