What should you do at a traffic circle?

Answer: B — Yield to vehicles already in the circle

At a traffic circle, the appropriate action is to yield to vehicles that are already in the circle. This is crucial for maintaining a smooth flow of traffic and preventing collisions. Vehicles that are circulating in the traffic circle have the right of way, and entering without yielding can disrupt traffic patterns and create hazardous situations. Yielding means you must slow down and assess the situation, allowing existing traffic in the circle to pass before you enter. This ensures all drivers can navigate the intersection safely and effectively. Understanding the right-of-way rules in a traffic circle helps to promote safety and efficiency on the road. The other options, such as speeding up, stopping completely, or using your horn, do not align with the safe and proper conduct expected at a traffic circle. Speeding up could interrupt the flow, stopping completely could confuse other drivers, and using your horn is unnecessary in this context. Prioritizing the yield rule maintains safety for all road users.