Which vehicle has the right of way at a four-way stop?

Answer: C — The vehicle that arrives first

At a four-way stop, the vehicle that arrives first has the right of way. This rule is crucial for maintaining order and safety at intersections where multiple vehicles approach simultaneously. The principle behind this rule is straightforward: if two or more vehicles reach the stop sign at the same time, the vehicle on the right has the priority to proceed. Thus, if a vehicle arrives first, it indicates that it has the established position to continue through the intersection, promoting an efficient flow of traffic and minimizing confusion among drivers. The other options suggest alternatives that can lead to inefficiencies or conflicts. For example, suggesting that the largest vehicle has the right of way could foster disputes among drivers, especially in situations where size does not equate to priority. Choosing a vehicle that arrives last or is turning left overlooks the importance of the designated order of precedence established to avoid accidents and ensure all drivers understand what is expected at such intersections.