question: As shown in the figure, in the circle O with a radius of 2.0, given that angle DAC = 30.0, the length of the line segment CD is ()
  Choices:
  A:1
  B:√{3}
  C:2
  D:2√{3}
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, in the circle O with a radius of 2.0, given that angle DAC = 30.0, the length of the line segment CD is ()
  Choices:
  A:1
  B:√{3}
  C:2
  D:2√{3}
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, in the circle O with a radius of 2.0, given that angle DAC = 30.0, the length of the line segment CD is ()
  Choices:
  A:1
  B:√{3}
  C:2
  D:2√{3}
question_for_eval: As shown in the figure, in the circle O with a radius of 2.0, given that angle DAC = 30.0, the length of the line segment CD is ()
  Choices:
  A:1
  B:√{3}
  C:2
  D:2√{3}