【单选题】

What does the announcement tell people

A、They should start leaving the exhibition hall now.
B．No more visitors will come.
C．The exhibition is still open.

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根据网考网移动考试中心的统计，该试题：

8%的考友选择了A选项

79%的考友选择了B选项

8%的考友选择了C选项

5%的考友选择了D选项