question: In the figure above, points A and B lie on the circle with center O. If x = 80, what is the value of z?
  Choices:
  A.80
  B.60
  C.50
  D.40
  E.10
query_wo: Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
  Question: In the figure above, points A and B lie on the circle with center O. If x = 80, what is the value of z?
  Choices:
  A.80
  B.60
  C.50
  D.40
  E.10
query_cot: Please first conduct reasoning, and then answer the question and provide the correct option letter, e.g., A, B, C, D, at the end.
  Question: In the figure above, points A and B lie on the circle with center O. If x = 80, what is the value of z?
  Choices:
  A.80
  B.60
  C.50
  D.40
  E.10
question_for_eval: In the figure above, points A and B lie on the circle with center O. If x = 80, what is the value of z?
  Choices:
  A.80
  B.60
  C.50
  D.40
  E.10