challenge: What event was organized by the Catalan Football Federation on 18 June 1955 to tribute Emilio Sampere?
  
  A. A single football match between Espanyol and the Catalan national team
  B. A football tournament featuring teams from Catalonia and Spain
  C. Two football matches: Espanyol vs. Catalan national team and Veterans vs. Combined players
  D. A award ceremony to honor Emilio Sampere's contributions to football
  Answer: 