Question: Activity D on a CPM network has predecessors B and C , and has successor F . D has duration 6 . B ' s

Activity D on a CPM network has predecessors B and C, and has successor F. D has duration 6. B's earliest finish is 18 whille Cs s 20. Fslate start is 26. Which of the following is definitelySelect one:Oa. D is critical, and has zero slack.Ob. Cs completed bafore BOc. D has no slack but is not critical.Od. Fls crifical, and has zero slacke. Bis a critical activity.

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