Final answer:
Emergency vehicle lights and siren are a signal for other drivers to yield the right of way, but do not allow for complete disregard of traffic safety laws.
Step-by-step explanation:
The lights and siren on an emergency vehicle are a request for drivers to yield right of way. This means that when you see an emergency vehicle with its sirens and lights on, you should pull over to the side of the road and stop if necessary to allow the emergency vehicle to pass quickly and safely. However, this does not mean the operator of an emergency vehicle can disregard all traffic laws or drive without concern for the safety of others.
The lights and siren on an emergency vehicle are not a request for drivers to yield right of way (Option A) or allow the operator of an emergency vehicle to drive without regard for the safety of others (Option B) or allow an emergency vehicle to be driven as fast as possible (Option C) or allow the emergency vehicle driver to disregard all traffic laws (Option D).
Instead, the purpose of the lights and siren on an emergency vehicle is to notify other drivers and pedestrians that the vehicle is responding to an emergency and that they should yield the right of way to allow the emergency vehicle to pass safely.