Which statement describes when it is a good time to apply a “use case”?

A.
You must understand the major process steps a customer wants for collaboration among
its sales force personnel.

B.
You must identify the network capacity required by a new Cisco TelePresence system.

C.
You must identify how many transactions should be included in a system test cycle.

D.
You must estimate a company’s cash flow impacts from upgrading security software to
the latest version.

Explanation: