What must a driver do when they see an emergency vehicle approaching with lights flashing?

Answer: B — Pull over to the side of the road and stop

When a driver sees an emergency vehicle approaching with flashing lights, it is crucial for them to pull over to the side of the road and stop. This action creates a clear path for the emergency vehicle, allowing it to navigate through traffic quickly and safely. Emergency responders, such as ambulances, fire trucks, and police cars, often need to reach their destinations urgently, and any delays can have serious consequences. By pulling over and stopping, the driver not only complies with road safety laws but also demonstrates a cooperative attitude towards public safety. This action is particularly important in busy urban areas where traffic can obstruct emergency vehicles. Therefore, pulling over and stopping is a critical component of responsible driving behavior in response to the presence of emergency situations on the road.