Which list of the steps of migration is in the correct sequence?

A.
Deploy Cisco Unified Communications service, deploy UC to the remote sites, deploy UC
at the central site, deploy UC-ready IP infrastructure

B.
Deploy UC-ready IP infrastructure, deploy Cisco Unified Communications service, deploy
UC at the central site, deploy UC to the remote sites

C.
Deploy Cisco Unified Communications service, deploy UC-ready IP infrastructure, deploy
UC to the remote sites, deploy UC at the central site

D.
Deploy UC-ready IP infrastructure, deploy Cisco Unified Communications service, deploy
UC to the remote sites, deploy UC at the central site