challenge: What was the result of the separation of Hirmand District from Zabol County after the 2006 National Census?
  
  A. The capital of Zabol County was changed to Hirmand
  B. Hirmand County was established with Dust Mohammad as its capital
  C. Zabol County was divided into two districts and three rural districts
  D. Zabol County was merged with another county
  Answer: 