【单选题】

The text is mainly about ______.
A．the search for effective cancer treatment drugs

B．the goals of cancer therapy
C．the success in reading genes
D．the advances in cancer treatment

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根据网考网移动考试中心的统计，该试题：

7%的考友选择了A选项

3%的考友选择了B选项

3%的考友选择了C选项

87%的考友选择了D选项

The text is mainly about ______.A．the search for effective cancer treatment drugs