question: Hint: Please answer the question and provide the correct option letter, e.g., A, B, C, D, at the end.
  Question: An employee at the craft store counted the number of red buttons in each bag of mixed buttons. How many bags had at least 60 red buttons but fewer than 81 red buttons?
  Choices:
  (A) 3
  (B) 1
  (C) 10
  (D) 2