You need to recommend a backup strategy for Hyper-V. What should you recommend?()
A、Take a snapshot of each VM, and then run a full backup of the Hyper-V hosts by using Windows Server  Backup.
B、Shut down the VMs,and then run a full backup of the Hyper-V hosts by using Windows Server Backup. Restart the VMs when the backup is complete.
C、From each VM,run a full backup by using Windows Server Backup, and then run a full backup of the Hyper-V hosts by using Windows Server Backup.
D、From each VM,run a full backup by using Windows Server Backup. Shut down the VMs, and then run a full backup of the Hyper-V hosts by using Windows Server Backup. Restart the VMs when the backup is complete.
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