Which description about storage backup in FusionSphere backup and recovery solution is correct? (Multiple choice)

Which description about storage backup in FusionSphere backup and recovery solution is correct? (Multiple choice)
A . batch backup and recovery for virtual machine system volume and data volumes
B . when production storage failure quickly recover the business
C . use array replication function to backup
D . when storage using NAS, use NAS replication function to backup

Answer: ABCD