challenge: What is notable about the way the Nieuwezijds Voorburgwal runs through Amsterdam?
  
  A. It intersects with many major streets throughout the city
  B. It runs north-south without intersecting major streets, except at Raadhuisstraat
  C. It forms the border between the city's old and new centers
  D. It runs east-west, parallel to the city's main canal
  Answer: 