Final answer:
When driving in a tunnel and experiencing engine troubles, it is safest to try to exit the tunnel while maintaining visibility with headlights on.
Step-by-step explanation:
If you are driving in a tunnel and your engine starts to make strange noises, the safest option would be B. Try to drive out of the tunnel.
It is critical to maintain visibility and safety within a tunnel, which includes keeping your headlights on and making your vehicle visible to other drivers. If you stop in the tunnel, you could obstruct traffic or cause a collision. Therefore, if the vehicle is still operational, continue to the end of the tunnel where it is safer to inspect the vehicle and seek help if necessary.