Final answer:
Right-of-way laws determine who has the privilege to proceed first at an intersection to help drivers understand traffic flow and prevent accidents.
Step-by-step explanation:
The correct answer to the question is b) right-of-way. Right-of-way laws are designed to help drivers understand who should be granted the privilege of proceeding first when more than one vehicle approaches an intersection at about the same time. These laws help maintain traffic flow and prevent accidents. For instance, at a four-way stop, drivers must yield to the vehicle that arrived first or, if two arrive simultaneously, to the vehicle on the right. Situations may arise, however, that require drivers to make judgment calls, such as when an emergency vehicle approaches with sirens and lights on or when a driver must respond to atypical situations for the greater good, like safely transporting someone in a medical emergency to a hospital.