What should a driver do when approaching a roundabout?

Answer: B — Yield to traffic already in the roundabout

When approaching a roundabout, the driver should yield to traffic already in the roundabout. This is because roundabouts are designed to maintain a continuous flow of traffic while minimizing potential collisions. Vehicles within the roundabout have the right of way, and yielding allows for a smoother entry and prevents disruptions in the traffic flow. By yielding, the driver is also ensuring safety for themselves and other road users. This practice helps to avoid accidents that could occur if a vehicle entered the roundabout without yielding to existing traffic. On the other hand, speeding up to merge into traffic can lead to dangerous situations, particularly if there is already a vehicle approaching in the roundabout. Signaling intentions is also crucial while in the roundabout, but it comes after the vehicle has yielded and is preparing to exit. Lastly, stopping completely before entering the roundabout is unnecessary if the way is clear, and could disrupt the steady flow of traffic.