Which solution will allow you to most easily virtualize the physical servers locally…?

You manage a complex environment consisting of several hundred virtual machines running
on vSphere ESXi 5.5 and 50 physical servers running applications. Which solution will allow
you to most easily virtualize the physical servers locally while moving your existing virtual
machines off-site to a cloud service provider, where they will be protected against failure?

A.
vCenter Server

B.
vCloud Automation Center