What is an accuratedifference between the Program Evaluation and Review Technique (PERT) and critical path method (CPM)?

Question 7 options:

	CPM involves more work than PERT because it requires several duration estimates
	CPM addresses the risk associated with duration estimates whereas PERT does not.
	Unlike CPM, PERT estimates only when there is no risk of uncertainty.
	PERT uses different duration estimates whereas CPM uses one specific duration estimate