question: As shown in the figure, point M is the midpoint of arc AB. if angle AOB = 140.0, then the degree of angle N is ()
  Choices:
  A:70°
  B:40°
  C:35°
  D:20°
query_wo: Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
  Question: As shown in the figure, point M is the midpoint of arc AB. if angle AOB = 140.0, then the degree of angle N is ()
  Choices:
  A:70°
  B:40°
  C:35°
  D:20°
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: As shown in the figure, point M is the midpoint of arc AB. if angle AOB = 140.0, then the degree of angle N is ()
  Choices:
  A:70°
  B:40°
  C:35°
  D:20°
question_for_eval: As shown in the figure, point M is the midpoint of arc AB. if angle AOB = 140.0, then the degree of angle N is ()
  Choices:
  A:70°
  B:40°
  C:35°
  D:20°