单项选择题
在工程网络计划执行过程中，如果某项工作实际进度拖延的时间超过其自由时差，则该工作（）。
A．必定影响其紧后工作的最早开始
B．必定变为关键工作
C．不会影响其后续工作的正常进行
D．不会影响工程总工期
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