question: As shown in the picture, It is known that AB perpendicular BD, CD perpendicular  BD. And it is measured that AB = 1.4, BP = 2.1, PD = 12.0. Then the height of the ancient city wall CD is ()
  Choices:
  A:6米
  B:8米
  C:10米
  D:12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 picture, It is known that AB perpendicular BD, CD perpendicular  BD. And it is measured that AB = 1.4, BP = 2.1, PD = 12.0. Then the height of the ancient city wall CD is ()
  Choices:
  A:6米
  B:8米
  C:10米
  D:12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 picture, It is known that AB perpendicular BD, CD perpendicular  BD. And it is measured that AB = 1.4, BP = 2.1, PD = 12.0. Then the height of the ancient city wall CD is ()
  Choices:
  A:6米
  B:8米
  C:10米
  D:12米
question_for_eval: As shown in the picture, It is known that AB perpendicular BD, CD perpendicular  BD. And it is measured that AB = 1.4, BP = 2.1, PD = 12.0. Then the height of the ancient city wall CD is ()
  Choices:
  A:6米
  B:8米
  C:10米
  D:12米