Navigating a Busy Roundabout

Four vehicles approach a busy roundabout from different directions: Vehicle A (green) from the top, Vehicle B (blue) from the right, Vehicle C (red) from the bottom, and Vehicle D (black) from the left. Each vehicle has different intentions, such as taking the first exit, going straight, and making a U-turn. This scenario tests the understanding of right of way, proper lane usage, and safe navigation in a roundabout.