Explanation:
When an emergency vehicle is approaching with its lights and siren on, drivers have certain responsibilities to ensure the safety and efficiency of the emergency response. The correct answer is B: "must move." Here's why:
1. Legal obligation: Most jurisdictions have laws that require drivers to yield the right of way to emergency vehicles. These laws are in place to ensure that emergency vehicles can quickly and safely reach their destination.
2. Safety of emergency personnel: By pulling over and stopping, drivers create a clear path for the emergency vehicle to pass. This allows the emergency personnel to reach their destination faster and provide immediate assistance if necessary.
3. Safety of other road users: When drivers pull over and stop, it reduces the risk of accidents or collisions. Emergency vehicles often need to navigate through traffic at high speeds, and having a clear path helps prevent accidents involving other vehicles on the road.
4. Following traffic laws: It is important for drivers to follow traffic laws and regulations. Failing to yield to an emergency vehicle can result in penalties such as fines or points on the driver's license.
In conclusion, when drivers encounter an approaching emergency vehicle with its lights and siren on, they must pull over and stop to allow the emergency vehicle to pass. This is not only a legal obligation but also a crucial step in ensuring the safety and efficiency of emergency response efforts.

Explanation:

When an emergency vehicle (such as an ambulance, fire truck, or police car) is approaching with its lights and siren on, it is important for drivers to pull over and stop to get out of the way. This is a crucial safety measure to allow the emergency vehicle to pass through quickly and reach its destination without any hindrance.

Reasoning:

- Emergency vehicles: These vehicles are responding to urgent situations where every second counts, such as medical emergencies, fires, or crimes in progress. They are equipped with sirens and flashing lights to alert other road users and gain priority on the road.

- Priority for emergency vehicles: When an emergency vehicle is approaching with its lights and siren on, it indicates that it requires immediate access to the road and needs other drivers to yield the right of way. The purpose is to ensure that the emergency vehicle can navigate through traffic safely and efficiently.

- Safety concerns: If drivers fail to pull over and stop when an emergency vehicle is approaching, it can result in delays for the emergency responders and potentially endanger the lives of those in need of urgent assistance. It is crucial to allow emergency vehicles unobstructed paths to reach their destinations as quickly as possible.

- Legal obligation: In many jurisdictions, it is a legal requirement for drivers to yield to emergency vehicles by pulling over and stopping. Failure to do so can result in fines or penalties. This emphasizes the importance of complying with this rule.

- Common practice: Even if there is no specific law in a particular jurisdiction, it is generally expected and considered common courtesy for drivers to give way to emergency vehicles. It is a responsible and respectful action to take in order to support the work of emergency responders and prioritize public safety.

Conclusion:

In conclusion, when an emergency vehicle is approaching with its lights and siren on, drivers must move by pulling over and stopping to get out of the way. This is not only a legal obligation in many jurisdictions but also a crucial safety measure to allow emergency vehicles to reach their destinations quickly and safely.