【单选题】

Which of the following can be inferred from the passage about patent medicines ( )
A．They did not cost much.

B．They helped heal snake bites.
C．They did not work very well.
D．They had a strong taste.

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根据网考网移动考试中心的统计，该试题：

2%的考友选择了A选项

11%的考友选择了B选项

83%的考友选择了C选项

4%的考友选择了D选项

Which of the following can be inferred from the passage about patent medicines ( )A．They did not cost much.