question: The graph shows the cost, in dollars, of a phone call for different call durations. The x-axis represents call length (minutes), and the y-axis represents call cost.
  
  What does this tell you?
  Choices:
  A:The cost of a call increases by $\$ 0.90$ for each additional minute
  B:Each additional dollar will buy an additional 0.9 minutes of call time
  C:The cost of a call decreases by $\$ 0.90$ for each additional minute
  D:Each additional dollar will buy 0.9 minutes less of call time than the previous dollar
query_wo: Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
  Question: The graph shows the cost, in dollars, of a phone call for different call durations. The x-axis represents call length (minutes), and the y-axis represents call cost.
  
  What does this tell you?
  Choices:
  A:The cost of a call increases by $\$ 0.90$ for each additional minute
  B:Each additional dollar will buy an additional 0.9 minutes of call time
  C:The cost of a call decreases by $\$ 0.90$ for each additional minute
  D:Each additional dollar will buy 0.9 minutes less of call time than the previous dollar
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: The graph shows the cost, in dollars, of a phone call for different call durations. The x-axis represents call length (minutes), and the y-axis represents call cost.
  
  What does this tell you?
  Choices:
  A:The cost of a call increases by $\$ 0.90$ for each additional minute
  B:Each additional dollar will buy an additional 0.9 minutes of call time
  C:The cost of a call decreases by $\$ 0.90$ for each additional minute
  D:Each additional dollar will buy 0.9 minutes less of call time than the previous dollar
question_for_eval: The graph shows the cost, in dollars, of a phone call for different call durations. The x-axis represents call length (minutes), and the y-axis represents call cost.
  
  What does this tell you?
  Choices:
  A:The cost of a call increases by $\$ 0.90$ for each additional minute
  B:Each additional dollar will buy an additional 0.9 minutes of call time
  C:The cost of a call decreases by $\$ 0.90$ for each additional minute
  D:Each additional dollar will buy 0.9 minutes less of call time than the previous dollar