【单选题】

He has made another wonderful discovery, ______ of great importance to science.
A．which I think it is

B．of which I think it is
C．I think which is
D．which I think is

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根据网考网移动考试中心的统计，该试题：

0%的考友选择了A选项

10%的考友选择了B选项

16%的考友选择了C选项

74%的考友选择了D选项

He has made another wonderful discovery, ______ of great importance to science.A．which I think it is