You have an Exchange Server 2010 organization. The network contains two Mailbox servers that are configured in a database availability group (DAG). You plan to implement a disaster recovery solution. You need to recommend a solution that ensures that the active mailbox database copy is unaffected by the backup process. You want to achieve this goal while minimizing costs.

What should you recommend?

A.
Windows Server Backup

B.
Network Attached Storage (NAS) snapshots

C.
Microsoft System Center Configuration Manager

D.
Microsoft System Center Data Protection Manager