You use Hyper-V Server 2008 R2 and failover clustering to host several virtual machines （VMs）. You plan to perform a Volume Shadow Copy （VSS） backup of a Cluster Shared Volume （CSV）. You need to ensure that resources can continue to use the CSV during the VSS backup. What should you do？（）

• A、Turn on redirected access for the CSV.
• B、Turn on maintenance mode for the CSV.
• C、Use Failover Cluster Manager to remove dependencies from your disk resources.
• D、Configure your VSS-aware backup utility as a generic application in failover clustering.