In the SAP HANA SystemReplication solution, which of the following statements is correct regarding the cross-site SystemReplication (secondary cascade) site (Datacenter) disaster recovery scenario?

In the SAP HANA SystemReplication solution, which of the following statements is correct regarding the cross-site SystemReplication (secondary cascade) site (Datacenter) disaster recovery scenario?
A . On the basis of the first site with dual-machine HA, deploy a disaster recovery site at the second remote site
B. Disaster recovery scenarios implemented by third-party disaster recovery software
C. Through system replication to solve the scene where the main system appears in the entire database system crash, including hard disk damage

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Answer: A