question: As shown in the figure, angle CAO = 22.5, OC = 6.0, then the length of CD is ()
  Choices:
  A:6√{2}
  B:3√{2}
  C:6
  D:12
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, angle CAO = 22.5, OC = 6.0, then the length of CD is ()
  Choices:
  A:6√{2}
  B:3√{2}
  C:6
  D:12
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, angle CAO = 22.5, OC = 6.0, then the length of CD is ()
  Choices:
  A:6√{2}
  B:3√{2}
  C:6
  D:12
question_for_eval: As shown in the figure, angle CAO = 22.5, OC = 6.0, then the length of CD is ()
  Choices:
  A:6√{2}
  B:3√{2}
  C:6
  D:12