challenge: What was the supposed composition of the 100 virgins paid as tribute by the Christian kingdom of Asturias to the Muslim emirate of Córdoba?
  
  A. All 100 were of noble birth
  B. Twenty-five were of noble birth, twenty-five were commoners, and fifty were clergy
  C. All 100 were commoners
  D. Fifty were of noble birth and fifty were commoners
  Answer: 