question: Hint: Please answer the question and provide the correct option letter, e.g., A, B, C, D, at the end.
  Question: For an assignment, Johnny looked at which countries got the most Nobel Prizes in various decades. In the 1990s, how many more Nobel Prize winners did Canada have than Italy? (Unit: Nobel Prize winners)
  Choices:
  (A) 4
  (B) 5
  (C) 6
  (D) 7