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What are vehicles required to do when they approach a roundabout?

- A.come to a complete stop and wait for traffic in the roundabout to clear.
- B.yield to the traffic in the roundabout.✓
- C.enter the roundabout at a speed of 35 mph.
- D.enter the roundabout to the left of the central island.
Why: When approaching a roundabout, you must yield the right-of-way to traffic already inside the circle. This ensures a smooth flow of traffic without requiring everyone to stop if the way is clear.
