challenge: What is the surface type and dimensions of the runway at Bear Creek 3 Airport?
  
  A. Asphalt, 2,000 by 50 feet
  B. Gravel and dirt, 1,675 by 40 feet
  C. Grass, 2,500 by 60 feet
  D. Concrete, 1,200 by 30 feet
  Answer: 