The black vehicle you intend to overtake signals its intention to move out to overtake — can you overtake it?
A)Yes, if you warn them with optical or acoustic signals.
B)No, under no circumstances.
C)No, because by signalling they have priority.Correct
Before beginning an overtaking manoeuvre, you must check that the driver of the vehicle ahead of you in the same lane has not indicated or begun their intention to move to the same side, in which case they have priority to carry it out first. If, after a reasonable period of time, they do not begin the overtaking manoeuvre, you may overtake them, having first warned them with acoustic or optical signals.