What must a driver do when approaching a roundabout?

When approaching a roundabout, a driver must yield to traffic coming from the left. This is because vehicles already circulating in the roundabout have the right of way. By yielding to the left, the driver ensures a smooth flow of traffic and helps prevent collisions. Roundabouts are designed to improve safety and efficiency, allowing vehicles to enter and exit without stopping whenever possible, which keeps traffic moving.

The other choices do not align with proper roundabout etiquette. Accelerating quickly to enter is unsafe and may disrupt the flow of traffic by forcing other drivers to brake. Stopping for all traffic is unnecessary since vehicles inside the roundabout have the right of way. Changing lanes in the roundabout can lead to confusion and potential accidents, as lane changes should only occur when exiting the roundabout. It is crucial to follow the yielding rules for safe navigation of these circular intersections.