【单选题】

In our own galaxy, the Milky Way, there are perhaps 200 billion stars, a small part of them probably have planets on which life is feasible.
A．a small fraction in which

B．a small fraction of which
C．a small fraction which
D．which a fraction of

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根据网考网移动考试中心的统计，该试题：

3%的考友选择了A选项

67%的考友选择了B选项

5%的考友选择了C选项

25%的考友选择了D选项

In our own galaxy, the Milky Way, there are perhaps 200 billion stars, a small part of them probably have planets on which life is feasible.A．a small fraction in which