challenge: According to the catalogue of Raynaud-Spanke, what is included in the listing of songs for Guiot de Dijon?
  
  A. Songs with attributions to Guiot, as well as those with conflicting attributions
  B. Only songs with confirmed attributions to Guiot de Dijon
  C. Only songs with no conflicting attributions
  D. Only songs with attributions to other composers
  Answer: 