challenge: What is the approximate width of the track in the Ring Settlements based on the design by Hermann Tilke?
  
  A. 8–10 m (26–33 ft)
  B. 15–18 m (49–59 ft)
  C. 10–12 m (33–39 ft)
  D. 12–15 m (39–49 ft)
  Answer: 