challenge: Which of the following statements about WC1 and WC2 postcode districts is true?
  
  A. They have postally-recognised localities within them.
  B. They were created in 1917 as part of the WC postal district.
  C. A significant recoding occurred in this postcode area from 1990 to 2007.
  D. They are not part of the London post town.
  Answer: 