How should you act when the electric signalling system has stopped working?

1. ADuring "lighting-up time" it is permitted to continue driving. At any other time - it is forbidden.
2. BDo not continue driving.
3. CSignal with your left hand, as prescribed by law.
4. DIt is permitted to continue driving to the nearest garage without signalling at all - even when signalling is mandatory.

Pick an answer to test yourself