question: In triangle ABC above, and D is the midpoint of AC. What is the length of BC?
  Choices:
  A.3*\sqrt{3}
  B.4*\sqrt{2}
  C.4*\sqrt{3}
  D.6*\sqrt{2}
  E.5*\sqrt{3}
  
query_wo: Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
  Question: In triangle ABC above, and D is the midpoint of AC. What is the length of BC?
  Choices:
  A.3*\sqrt{3}
  B.4*\sqrt{2}
  C.4*\sqrt{3}
  D.6*\sqrt{2}
  E.5*\sqrt{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: In triangle ABC above, and D is the midpoint of AC. What is the length of BC?
  Choices:
  A.3*\sqrt{3}
  B.4*\sqrt{2}
  C.4*\sqrt{3}
  D.6*\sqrt{2}
  E.5*\sqrt{3}
  
question_for_eval: In triangle ABC above, and D is the midpoint of AC. What is the length of BC?
  Choices:
  A.3*\sqrt{3}
  B.4*\sqrt{2}
  C.4*\sqrt{3}
  D.6*\sqrt{2}
  E.5*\sqrt{3}
  