In what scenario is it mandatory to yield at a four-way stop?

At a four-way stop, it is mandatory to yield to the vehicle that arrives first. This rule is based on the understanding that the first vehicle to reach the intersection has the right of way. When multiple vehicles arrive at the same time, the general rule is that the vehicle on the right has the priority; however, the primary principle to remember is that the first vehicle to stop at the intersection should proceed first. This helps in maintaining order and reducing confusion at intersections, ensuring that drivers know who has the right to go first based on their arrival time.

In addition, while yielding to pedestrians is certainly important and mandated in various situations, at a stop sign, you first need to establish the right of way among vehicles before focusing on pedestrian crossings. The option about yielding to the vehicle on the left is not accurate since the right of way rules do not assign priority based on relative positioning like left and right unless at the same time, and yielding to the vehicle on the right is specifically relevant when two vehicles reach the stop sign at exactly the same moment. Understanding these principles is essential for safe and responsible driving at intersections.