Which statement is true about Project Scheduling? a. Slack isdefined as the diff

Which statement is true about Project Scheduling? a. Slack isdefined as the difference between the earliest start and the latestfinish of a task. b. The critical path seldom has a slack time ofzero. c. Project crashing is an effort to maximize projectduration. d. The earliest finish for a task is equal to the earlystart plus the task duration. e. None of the above statements aretrue.