Based on the activity network pictured above, what is the BEST statement? $(1$mark$)$

A$)$ Before starting Activity C$,$ Activity A and Activity B must be completed.

B$)$ Before starting Activity D$,$ Activity A and Activity B need to be completed.

C$)$ Before starting Activity E$,$ Activity A and Activity B need to be completed.

D$)$ Before starting Activity C$,$ Activity A and Activity D must be completed.