Which solution would allow the administrator to most easily virtualized the physical servers locally while moving existing virtual machines off-site to a cloud service provider?

An administrator manages a complex environment consisting of several hundred virtual
machines running on vsphere ESXi 5.5host. The environment also includes 50 physical
application servers.Which solution would allow the administrator to most easily virtualized
the physical servers locally while moving existing virtual machines off-site to a cloud service
provider?

A.
vRealize Orchestrator

B.
vCloud Air

C.
vRealize Automation

D.
vCenter Server