question: After filling some oil in a cylindrical oil tank with a diameter of 200.0, the cross section is shown in the figure. If the width of the oil surface AB = 160.0, the maximum depth of oil is ()
  Choices:
  A:40cm
  B:60cm
  C:80cm
  D:100cm
query_wo: Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
  Question: After filling some oil in a cylindrical oil tank with a diameter of 200.0, the cross section is shown in the figure. If the width of the oil surface AB = 160.0, the maximum depth of oil is ()
  Choices:
  A:40cm
  B:60cm
  C:80cm
  D:100cm
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: After filling some oil in a cylindrical oil tank with a diameter of 200.0, the cross section is shown in the figure. If the width of the oil surface AB = 160.0, the maximum depth of oil is ()
  Choices:
  A:40cm
  B:60cm
  C:80cm
  D:100cm
question_for_eval: After filling some oil in a cylindrical oil tank with a diameter of 200.0, the cross section is shown in the figure. If the width of the oil surface AB = 160.0, the maximum depth of oil is ()
  Choices:
  A:40cm
  B:60cm
  C:80cm
  D:100cm