If driving in a tunnel, what should you be cautious of?

Answer: B — Low visibility and ventilation issues

When driving in a tunnel, it is essential to be cautious of low visibility and ventilation issues. Tunnels can limit the amount of natural light, making it difficult to see clearly. Additionally, the lack of fresh air circulation can lead to poor air quality, which can be particularly concerning in case of an accident or vehicle breakdown. Proper awareness of these conditions can help drivers navigate safely through tunnels. It's important to approach tunnels with reduced speed and increased alertness due to these factors, ensuring a safer experience for both the driver and any passengers.