question: then the length of the ladder is ()
  Choices:
  A:5.60m
  B:6.00m
  C:6.10m
  D:6.20m
query_wo: Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
  Question: then the length of the ladder is ()
  Choices:
  A:5.60m
  B:6.00m
  C:6.10m
  D:6.20m
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: then the length of the ladder is ()
  Choices:
  A:5.60m
  B:6.00m
  C:6.10m
  D:6.20m
question_for_eval: then the length of the ladder is ()
  Choices:
  A:5.60m
  B:6.00m
  C:6.10m
  D:6.20m