What should a driver do if traffic comes to a halt in a tunnel?

1. A.Switch on front and rear fog lights.
2. B.Select a low gear and keep the engine running.
3. C.Switch off the engine.

This is an official-style question from the Safe and Responsible Driving topic of the Ireland driver theory test (Cat. B). Practise all 807 questions free on iTest.ie — with timed mock exams, automatic mistake tracking and progress sync across devices.