【单选题】
Questions 6 and 7 are based on the following news. According to news, the West Virginia coal mine disasterA．caused minor injuries.
B．was the worst one since 1984.
C．was caused by terrorist attack.
D．happened in early mornin
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根据网考网移动考试中心的统计，该试题：
27%的考友选择了A选项
55%的考友选择了B选项
16%的考友选择了C选项
2%的考友选择了D选项
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