Question: Activity D on a CPM network has predecessors B and C, and has successor F. D has duration 5. B's earliest finish is 18, while

Activity D on a CPM network has predecessors B and C, and has successor F. D has duration 5. B's earliest finish is 18, while C's is 15. F's late start is 23. Which of the following is definitely TRUE? D is critical, and has a slack of 5 days. C is completed before B. B has no slack and is critical. C has no slack and is critical. F is not critical, and has slack of 23 days.

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