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Question $7$ of $36$

Question $7$

$8\mathrm{.}5$ points

A project task has an early start time of $3,$ a late start time of $6,$ an early finish time of $9,$ and a late finish time of $12.$ What is the task's slack?

A$.4$

B$.12$

C$.0$

D$.6$

E$.3$

F$.9$