question: How many solutions 
  does the system have?
  Choices:
  A:One
  B:Two
  C:Three
  D:Four
query_wo: Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
  Question: How many solutions 
  does the system have?
  Choices:
  A:One
  B:Two
  C:Three
  D:Four
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: How many solutions 
  does the system have?
  Choices:
  A:One
  B:Two
  C:Three
  D:Four
question_for_eval: How many solutions 
  does the system have?
  Choices:
  A:One
  B:Two
  C:Three
  D:Four