A storage administrator is planning to back up virtual machines residing on an ESX 4.0 server using EMC Avamar and VMware vSphere. What is a characteristic of this type of backup?

A.
Image proxy is located on a virtual machine

B.
Avamar Interoperability Module must be installed

C.
All virtual machines must be powered on

D.
All virtual machines must be running Microsoft Windows 2003