You plan to deploy a Hyper-V host that runs Windows Server 2008 R2 Service Pack 1 （SP1）. You need to recommend a solution for the virtual machines （VMs） on the Hyper-V host. The solution must meet the following requirements： - The VMs must not increase beyond their original size. - The VMs must be backed up by using a host-based backup. What should you include in the recommendation？（）

A. pass-through disks
B. a Virtual Desktop Infrastructure （VDI）
C. Device Client Access Licenses （CALs）
D. Multipath I/O
E. User Client Access Licenses （CALs）
F. Microsoft Enterprise Desktop Virtualization （MED-V）
G. VM snapshots
H. Microsoft Application Virtualization （App-V）
I. Second-Level Address Translation （SLAT）
J. Microsoft Software Assurance
K. Dynamic Memory
L. a legacy network adapter
M. differencing disks
N. fixed-size disks
O. CPU Core Parking