challenge: Where is the Dodé Mosque located?
  
  A. Raidi Township, Shannan City, Tibet Autonomous Region
  B. Lhasa City, Shigatse City, Tibet Autonomous Region
  C. Chengguan District, Shannan City, Tibet Autonomous Region
  D. Dodé Valley, Raidi Township, Chengguan District, Lhasa City, Tibet Autonomous Region
  Answer: 