question: As shown in the figure, the line l parallel  m parallel  n, the vertices B and C of the triangle ABC are on the line n and line m, the angle between BC and the line n is 25.0, then the degree of angle a is ()
  Choices:
  A:25°
  B:30°
  C:35°
  D:45°
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, the line l parallel  m parallel  n, the vertices B and C of the triangle ABC are on the line n and line m, the angle between BC and the line n is 25.0, then the degree of angle a is ()
  Choices:
  A:25°
  B:30°
  C:35°
  D:45°
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, the line l parallel  m parallel  n, the vertices B and C of the triangle ABC are on the line n and line m, the angle between BC and the line n is 25.0, then the degree of angle a is ()
  Choices:
  A:25°
  B:30°
  C:35°
  D:45°
question_for_eval: As shown in the figure, the line l parallel  m parallel  n, the vertices B and C of the triangle ABC are on the line n and line m, the angle between BC and the line n is 25.0, then the degree of angle a is ()
  Choices:
  A:25°
  B:30°
  C:35°
  D:45°