challenge: Who made the first ascent of Mont Pelvoux?
  
  A. Captain Durand, Alexis Liotard, and Jacques-Etienne Matheoud
  B. Captain Durand and Alexis Liotard
  C. Captain Durand and Jacques-Etienne Matheoud
  D. Alexis Liotard and Jacques-Etienne Matheoud
  Answer: 