question: As shown in the figure, AB = AC, the perpendicular bisector of AB intersects AC at D, then the degree of angle BDC is ()
  Choices:
  A:72°
  B:36°
  C:60°
  D:82°
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, AB = AC, the perpendicular bisector of AB intersects AC at D, then the degree of angle BDC is ()
  Choices:
  A:72°
  B:36°
  C:60°
  D:82°
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, AB = AC, the perpendicular bisector of AB intersects AC at D, then the degree of angle BDC is ()
  Choices:
  A:72°
  B:36°
  C:60°
  D:82°
question_for_eval: As shown in the figure, AB = AC, the perpendicular bisector of AB intersects AC at D, then the degree of angle BDC is ()
  Choices:
  A:72°
  B:36°
  C:60°
  D:82°