Which of these is a phase of Cisco Lifecycle Service？（）

A.Identify the activities involved in installing and configuring equipment at a customer’s site or sites
B.Describe the day-to-day activities required to support， manage， and monitor a newly implemented system
C.Access current network readiness， site readiness， and operational readiness in preparation for designing a solution proposal
D.Gain an understanding of high-level business and technical requirements

A.Technology Strategy Development
B.Account Qualification and Planning
C.Business Case Development
D.Proof of Concept

A.plan
B.design
C.prepare
D.operate