【单选题】

The viewpoint of the EPA is ______.
A．there is casual link between electricity and cancer

B．electricity really affects cancer
C．controversial
D．low frequency electromagnetic field is a possible cause of cancer

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根据网考网移动考试中心的统计，该试题：

60%的考友选择了A选项

9%的考友选择了B选项

2%的考友选择了C选项

29%的考友选择了D选项

The viewpoint of the EPA is ______.A．there is casual link between electricity and cancer