question: As shown in the figure, triangle ABC is inscribed in circle O with radius 1.0, if angle BAC = 60.0, then the length of BC is ()
  Choices:
  A:2
  B:2√{3}
  C:√{3}
  D:2√{2}
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, triangle ABC is inscribed in circle O with radius 1.0, if angle BAC = 60.0, then the length of BC is ()
  Choices:
  A:2
  B:2√{3}
  C:√{3}
  D:2√{2}
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, triangle ABC is inscribed in circle O with radius 1.0, if angle BAC = 60.0, then the length of BC is ()
  Choices:
  A:2
  B:2√{3}
  C:√{3}
  D:2√{2}
question_for_eval: As shown in the figure, triangle ABC is inscribed in circle O with radius 1.0, if angle BAC = 60.0, then the length of BC is ()
  Choices:
  A:2
  B:2√{3}
  C:√{3}
  D:2√{2}