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【单选题】
在活动图中，结点表示项日中各个工作阶段的里程碑，连接各个结点的边表示活动，边上的数字表示活动持续的时间。在下面的活动图中，从A到J的关键路径是(16)，关键路径的长度是(17)，从E开始的活动启动的最早时间是(18)。
A.
ABEGJ
B.
ADFHJ
C.
ACFGJ
D.
ADFIJ
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