Question: Activity R on a CPM network has predecessors M and N, and has successor S. R has duration 5. N's late finish is 18, while

Activity R on a CPM network has predecessors M

Activity R on a CPM network has predecessors M and N, and has successor S. R has duration 5. N's late finish is 18, while M's is 20. S's late start is 22. Which of the following is definitely true? O A. N is a critical activity. OB. R is critical and has zero slack. C. S is a critical activity. D. The set of times cannot all be possible. O E. R has no slack but is not critical

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