What should you do when approaching a roundabout?

Answer: B — Yield to traffic already in the roundabout

When approaching a roundabout, yielding to traffic already in the roundabout is the correct action. This is crucial because vehicles within the roundabout have the right of way. By yielding, you ensure smoother traffic flow and reduce the risk of collisions, which is a key principle of safe driving. Additionally, the design of roundabouts encourages continuous movement and minimizes the chances of accidents. Therefore, approaching the roundabout at a moderate speed allows you to assess the situation and enter safely when there is a sufficient gap in traffic. This practice enhances overall road safety and efficiency.