challenge: What are the two official Russian names for Transnistria?
  
  A. Trans-Dniester and Transdnistria
  B. Pridnestrovskaia Moldavskaia Respublica and Transdniester
  C. Pridnestrovskaia Moldavskaia Respublica and Pridnestrovie
  D. Trans-Dniestria and Transdniestr
  Answer: 