challenge: What is the basis for the 1954 American adventure film 'The Naked Jungle'?
  
  A. The 1937 short story 'Leiningen Versus the Ants' by Carl Stephenson
  B. A true story of a cocoa plantation in Brazil
  C. A screenplay by Charlton Heston
  D. A novel by Ernest Hemingway
  Answer: 