The driver is obliged to warn by means of optical signals...
A)only manoeuvres that do not involve a lateral movement.
B)the intention to stop their vehicle or to slow down considerably.Correct
C)only the intention to brake their vehicle.
Drivers must signal their manoeuvres, whether or not they involve a lateral movement, and not only when braking the vehicle, so answers a) and c) are not correct.
Answer b) is correct. Drivers are obliged to indicate by means of optical signals their intention to stop their vehicle or to slow down considerably.
This is done by repeatedly using the brake lights or by moving the arm alternately up and down, with short, quick movements.
This is done by repeatedly using the brake lights or by moving the arm alternately up and down, with short, quick movements.