A vehicle is overtaking you and cannot complete the manoeuvre safely — what should you do?

A vehicle is overtaking you and cannot complete the manoeuvre safely — what should you do?
A)Increase speed, to prevent the overtaking.
B)Continue on the same course as normal, since it is not the problem of the vehicle being overtaken.
C)Facilitate the completion of the overtaking manoeuvre.Correct
During an overtaking manoeuvre, the driver of the vehicle being overtaken must continue to facilitate the manoeuvre. This obliges them not to increase their speed, not to perform any manoeuvre that prevents or obstructs the overtaking, and to reduce their speed if, once the overtaking manoeuvre has begun, a dangerous situation arises — unless the other vehicle abandons the manoeuvre, in which case we must increase speed to facilitate their return to the lane.