单项选择题

His failure to observe the safety regulations resulted in an accident to the machinery.（）

A.他没有能够遵守机器操作原理，出现了事故。
B.他在遵守机器安全操作规则上失败了，结果是出了事故。
C.他没有看清楚安全守则，结果机器出了毛病。
D.因为他没有遵守安全规则，机器出了故障。

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