【单选题】

__________her mother started to go to the meditation class．

A.It was at about this time that
B.That was about this time
C.It was at about this time when
D.It was about this time that

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根据网考网移动考试中心的统计，该试题：

66%的考友选择了A选项

20%的考友选择了B选项

11%的考友选择了C选项

3%的考友选择了D选项