If you are immobilized in a tunnel due to an emergency, what should you do?

If you are immobilized in a tunnel due to an emergency, what should you do?
A)Do not turn off the engine and turn on the lights.
B)Turn off the engine and leave the position lights on along with the hazard lights.Correct
C)Turn off the engine and abandon the vehicle.
If the breakdown allows you to continue, you should leave the tunnel or underpass; if not possible, direct the vehicle towards the nearest emergency area (lay-by); otherwise, immobilize the vehicle on the right edge. Additionally you must:

- Stop the engine, leave the position lights on and turn on the hazard lights.
- Place the danger pre-signaling device, an auto-yellow colored device with geolocation and autonomous power supply (battery), which should be placed on the highest possible part of the immobilized vehicle to ensure maximum visibility.
- Request help through the emergency post and follow the instructions given through it.
- Leave the vehicle heading to the nearest shelter or exit, without walking on the roadway if there are areas excluded from vehicle traffic.