challenge: What is the etymological origin of the name 'Kobjeglava'?
  
  A. Reduction of *Kobilja glava 'mare's head'
  B. Derived from 'Kobilja kopita' meaning 'mare's hoof'
  C. Derived from 'Cobila glaua' meaning 'blue horse'
  D. Based on the metaphor of 'Cublaglauua'
  Answer: 