A PERT Network Consists of Activities Linked by Arrows

Multiple Choice

A PERT network consists of activities linked by arrows. Suppose two of the activities on the network are labeled "A" and "B." An arrow from "A" to "B" indicates that

A) the same resources used to complete "A" are also used to complete "B."
B) "A" and "B" can be completed at the same time.
C) "A" takes longer to complete than "B."
D) "A" must be completed before "B" can begin.