Final answer:
The safe thing to do when driving through a tunnel is to turn on lights and take off sunglasses to enhance visibility. The correct answer is option B.
Step-by-step explanation:
When driving through a tunnel, the safe thing to do is B. turn on lights and take off sunglasses. This ensures that you have adequate visibility inside the tunnel and that other drivers can see your vehicle. Having your headlights on is crucial in dimly lit or dark conditions, such as in a tunnel, to prevent accidents.
Taking off your sunglasses will allow you to see clearly, as most tunnels are darker than the outside environment. Additionally, removing sunglasses helps to adapt your eyes to the lower light levels inside the tunnel.
Improving your ability to see the road and potential hazards. It's important to maintain a proper speed and follow tunnel signage to ensure safety for all drivers.