In the network diagram below, there are five activities with finish$-$to$-$start dependencies. The numbers display the duration of each activity as days.

Which one of the following statements is WRONG about the activities or the project?

A$.$

The overall project duration is $7$ days.

B$.$

The late finish day is $6$ days for activities B and C$.$

C$.$

The slacks are zero for activities B$,$ C$,$ and D$.$

D$.$

The critical path includes activities A$,$ D$,$ and E$.$