What are data storage replication concepts for high availability and disaster recovery? (Select all that apply)

What are data storage replication concepts for high availability and disaster recovery? (Select all that apply)
A . Backup and restore of virtual machines
B . Synchronous and asynchronous data replication
C . Using RAID (Redundant Array of Independent Disks) for replication
D . Cross-region data replication for disaster recovery

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Answer: BD