challenge: Under what license was the data released by the National Maritime Museum as part of the Warship Histories project?
  
  A. Creative Commons Attribution-NonCommercial 3.0 Unported
  B. Creative Commons Attribution-NoDerivatives 3.0 Unported
  C. Creative Commons Attribution-ShareAlike 3.0 Unported UK: England & Wales
  D. Creative Commons Zero 1.0 Universal
  Answer: 