challenge: What was the outcome for the Bermontians after the Battle of Radviliškis?
  
  A. They retreated into Riga and regrouped
  B. They advanced further into Lithuania and the Baltic States
  C. They were completely annihilated and ceased to exist
  D. They retreated into Tilsit, while Bermondt-Avalov escaped through Klaipėda
  Answer: 