question: As shown in the figure, it is known that AB and AD are the chords of circle O, angle BOD = 50.0, then the degree of angle BAD is ()
  Choices:
  A:50°
  B:40°
  C:25°
  D:35°
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, it is known that AB and AD are the chords of circle O, angle BOD = 50.0, then the degree of angle BAD is ()
  Choices:
  A:50°
  B:40°
  C:25°
  D:35°
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, it is known that AB and AD are the chords of circle O, angle BOD = 50.0, then the degree of angle BAD is ()
  Choices:
  A:50°
  B:40°
  C:25°
  D:35°
question_for_eval: As shown in the figure, it is known that AB and AD are the chords of circle O, angle BOD = 50.0, then the degree of angle BAD is ()
  Choices:
  A:50°
  B:40°
  C:25°
  D:35°