simple CPM network has five activities, A$,$ B$,$ C$,$ D$,$ and E$.$ A is an immediate predecessor of B and of C$.$ B and C is immediate prodecessor of D$.$ D is immediate predecessors of E Which of the following statements is TRUE?"

There are four paths in this network

There are five paths in this network.

The critical path is A$-$B$-$D$-$E

The duration of critical path is $21$

The duration of critical path is $17$