challenge: What is notable about the Coney Island Cyclone's structure in relation to modern New York City building codes?
  
  A. It is an 'irreplaceable' structure because timber-supported coasters can no longer be built under modern codes
  B. It has the longest track in the city
  C. It is the only coaster in the city with a steel support system
  D. It is the tallest coaster in the city
  Answer: 