What should you do if you approach a roundabout?

When approaching a roundabout, it is important to yield to traffic that is already inside the roundabout. This ensures a smooth and safe flow of vehicles. Vehicles inside the roundabout have the right of way, which means that those entering must wait for a gap in the traffic before proceeding. This practice minimizes the risk of collisions and helps maintain efficient traffic movement.

The other responses suggest actions that could lead to potential hazards, such as speeding up to merge quickly, which can be dangerous. Signaling only when exiting does not provide enough information to other drivers and can lead to confusion. Completely stopping before entering is unnecessary if the way is clear, and it could disrupt the flow of traffic in the roundabout. Therefore, yielding is the correct approach when navigating roundabouts.