Your organization has an Active Directory Domain Services (AD DS) domain. All client computers run Windows 7. You use Microsoft System Center Virtual Machine Manager (VMM) 2008 R2 to manage your Hyper-V hosts. Your environment includes Microsoft Enterprise Desktop Virtualization (MED-V). You plan to deploy a virtual machine (VM) image to all client computers. You need to ensure that user state information is maintained between sessions in the VM. What should you do? （）

A. Use VMM to configure placement settings.
B. Configure a MED-V revertible workspace policy.
Configure a MED-V persistent workspace policy.
D. Use Hyper-V Manager to create a revert snapshot.