When immobilising a car in an emergency, should the hazard pre-warning device be placed?

When immobilising a car in an emergency, should the hazard pre-warning device be placed?
A)No, it is sufficient to switch on the hazard warning lights.
B)Yes, always in front of the immobilised vehicle.
C)Yes, on the highest possible part of the immobilised vehicle ensuring maximum visibility, if using the luminous signal.Correct
The V-16 hazard pre-warning device is an approved amber-coloured luminous device with geolocation, operating on autonomous power (battery or rechargeable battery). It must be placed on the highest part of the immobilised vehicle, ensuring maximum visibility. Currently, the V-16 is the only legal option for signalling an immobilised vehicle or an obstacle on the road, with pre-warning triangles now obsolete.