question: E B \parallel D C. Find x.
  Choices:
  A:5
  B:7.5
  C:9.5
  D:10
query_wo: Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
  Question: E B \parallel D C. Find x.
  Choices:
  A:5
  B:7.5
  C:9.5
  D:10
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: E B \parallel D C. Find x.
  Choices:
  A:5
  B:7.5
  C:9.5
  D:10
question_for_eval: E B \parallel D C. Find x.
  Choices:
  A:5
  B:7.5
  C:9.5
  D:10