At a four-way stop, what should the vehicle approaching from the right do?

Answer: C — Yield to the vehicle approaching from the left.

When approaching a four-way stop, the rules of right-of-way dictate that the vehicle on the right has the priority to proceed. In this scenario, if a vehicle is approaching from the right, it must yield to any vehicles that are already at the intersection or any vehicles that have arrived before it. This ensures a safe and orderly flow of traffic. By yielding to the vehicle on the left, the vehicle on the right is adhering to these rules. This practice is in place to reduce confusion and prevent accidents at intersections where visibility may be limited. The other options suggest alternatives that do not align with these established rules. It's essential for drivers to understand the significance of yielding correctly at these intersections to promote road safety for everyone involved.