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【单选题】

girl spErm wAs prEFErrED to Boy spErm in thE rEsEArCh most proBABly BECAusE ________.
A．girl spErm ContAins morE gEnEtiC mAtEriAl
B．morE mothErs wAnt to hAvE girl BABiEs
C．girl spErm is hEAlthiEr AnD morE ACtivE
D．girl spErm is morE EAsily puriFiED

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根据网考网移动考试中心的统计，该试题：

53%的考友选择了A选项

20%的考友选择了B选项

23%的考友选择了C选项

4%的考友选择了D选项

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