Suppose that PERT is used to develop a schedule for a project with eight activities, labeled A through H. It is found that the critical activities are A, B, D, G, and H. The expected project completion time E[T] is 39.250 weeks. Var(T), the variance of the project duration, is 4.667 weeks².

What process was used to compute Var(T), the variance of the project duration?

	A.	By taking the square root of E[T]
	B.	By adding the variances of the activities NOT on the critical path (C, E, and F)
	C.	By adding the variances of all activities in the project
	D.	By adding the variances of the activities along the critical path (A, B, D, G, and H)