What is the appropriate action when approaching a roundabout?

Answer: A — Yield to traffic already in the roundabout

When approaching a roundabout, the appropriate action is to yield to traffic already in the roundabout. This is critical for maintaining the flow of traffic and ensuring safety. Vehicles within the roundabout have the right of way, which helps prevent accidents and contributes to a smoother transition for vehicles entering the roundabout. Yielding allows for a more organized exchange of vehicles, reducing the likelihood of collisions. By waiting for a safe gap in the traffic already circulating, drivers can merge into the roundabout without causing disruptions or hazards to those who are already traveling in it. Other options, such as stopping before entering or accelerating to merge quickly, do not align with safe driving practices at roundabouts. Stopping unnecessarily can lead to confusion and traffic build-up, while entering without yielding can create dangerous situations for both entering and circulating vehicles.