What should a driver do if they encounter a roundabout?

Answer: A — Yield to traffic in the roundabout

When encountering a roundabout, the most appropriate action for a driver is to yield to traffic that is already within the roundabout. This ensures a smooth flow of traffic and helps prevent collisions, as vehicles within the roundabout have the right of way. Properly yielding allows for safe entry into the roundabout once there is a clear gap in traffic. Yielding is essential because roundabouts are designed to reduce the number of conflict points and improve traffic efficiency. The flow of traffic is continuous, and by yielding, drivers contribute to the safety and functionality of the intersection, allowing vehicles to navigate without unnecessary stops or delays. The other options would likely lead to disruptions or hazardous situations. Stopping at the entrance could create confusion and block traffic from entering, while entering without yielding or accelerating to merge could lead to dangerous encounters with vehicles that are already circulating in the roundabout, increasing the risk of accidents. Understanding the correct protocol when navigating roundabouts is vital for maintaining safety on the road.