It is prohibited to make a left-hand turn when there is no...
A)sign expressly authorising it.
B)sufficient visibility.Correct
C)place expressly designed for it.
The driver of a vehicle who intends to turn right or left to use a different road, take another carriageway of the same road or to leave it, must give prior and sufficient warning to the drivers of vehicles travelling behind them and make sure that the speed and distance of vehicles approaching from the opposite direction allow the manoeuvre to be carried out without danger, refraining from doing so if these conditions are not met. They must also refrain from carrying out the manoeuvre when it is a left-hand change of direction and there is insufficient visibility.