Due to a breakdown and during the day, what should you do in the event of an immobilisation of the vehicle on a motorway?

A)Place 2 hazard pre-signalling triangles 50 metres away and visible from 100 metres.
B)Place the hazard pre-signalling device on the highest possible part of the immobilised vehicle, ensuring its maximum visibility, and turn on the emergency lights.Correct
C)Notify as soon as possible using an SOS post.
If the immobilisation is on a motorway or dual carriageway, the emergency lights must always be used, even during the day, and if it is also due to a breakdown, the pre-signalling device will be placed.
The V-16 hazard pre-signalling device is an auto yellow luminous device, type-approved and with geolocation, which operates on autonomous power (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 to signal an immobilised vehicle or an obstacle on the road, with pre-signalling triangles falling into disuse.
The V-16 hazard pre-signalling device is an auto yellow luminous device, type-approved and with geolocation, which operates on autonomous power (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 to signal an immobilised vehicle or an obstacle on the road, with pre-signalling triangles falling into disuse.