$12.$ When extending a project network, one problem is that under the standard finish$-$to$-$start relationship, you cannot start the next activity until the predecessor activity is complete. You can overcome this problem by breaking activities further into segments and starting a new activity once the appropriate segment is complete. This technique is called:

A$.$ An AON Network

B$.$ Concurrent engineering

C$.$ Lagging

D$.$ Laddering

E$.$ Staggering

F$.$ Crashing