On a PERT$$ chart, an arrow from$$ "Activity D$"$ to$$ "Activity E$"$ indicates that$\_\_\_\_\_\_\_.$

Question content area bottom

Part $1$

A$.$

this is the critical path for the project$$

B$.$

Activity D must be completed before Activity E can start

C$.$

Activity E will take longer to complete than Activity D

D$.$

Activity D takes longer to complete than Activity E

E$.$

both activities can be completed simultaneously