Which of the following statements regarding the right-of-way in circular intersections is true?

• Vehicles entering the intersection must yield to traffic already in the circle.
  Explanation:

  "In circular intersections, vehicles entering the circle must yield to traffic already circulating within it. Vehicles inside the circle have the right-of-way over those entering."
• Vehicles already in the circle must yield to traffic entering the intersection.
• Vehicles already in the circle must yield to cyclists entering the intersection.
• None of the above