question: The graph of $y=2^{x}$ is displayed here, whose y-intercept=1 and all values > 0. Which single option below gives us the graph's domain?
  Choices:
  A.$x \geq 0$
  B.$x>0$
  C.All real $x$
  D.$x<0$
query_wo: Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
  Question: The graph of $y=2^{x}$ is displayed here, whose y-intercept=1 and all values > 0. Which single option below gives us the graph's domain?
  Choices:
  A.$x \geq 0$
  B.$x>0$
  C.All real $x$
  D.$x<0$
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 of $y=2^{x}$ is displayed here, whose y-intercept=1 and all values > 0. Which single option below gives us the graph's domain?
  Choices:
  A.$x \geq 0$
  B.$x>0$
  C.All real $x$
  D.$x<0$
question_for_eval: The graph of $y=2^{x}$ is displayed here, whose y-intercept=1 and all values > 0. Which single option below gives us the graph's domain?
  Choices:
  A.$x \geq 0$
  B.$x>0$
  C.All real $x$
  D.$x<0$