question: As shown in the figure, if the length of the benchmark BE is 2.0, AB = 3.0, AC = 9.0, then the tree CD is ()
  Choices:
  A:6米
  B:7.5米
  C:8米
  D:8.5米
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, if the length of the benchmark BE is 2.0, AB = 3.0, AC = 9.0, then the tree CD is ()
  Choices:
  A:6米
  B:7.5米
  C:8米
  D:8.5米
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, if the length of the benchmark BE is 2.0, AB = 3.0, AC = 9.0, then the tree CD is ()
  Choices:
  A:6米
  B:7.5米
  C:8米
  D:8.5米
question_for_eval: As shown in the figure, if the length of the benchmark BE is 2.0, AB = 3.0, AC = 9.0, then the tree CD is ()
  Choices:
  A:6米
  B:7.5米
  C:8米
  D:8.5米