Bank A uses Huawei’s hybrid flash storage to build a 3DC multi-site disaster recovery solution. Which of the following options are correct regarding the advantages of this solution? (Multiple choice)

Bank A uses Huawei’s hybrid flash storage to build a 3DC multi-site disaster recovery solution. Which of the following options are correct regarding the advantages of this solution? (Multiple choice)
A . Unified storage operating system platform to ensure replication and interoperability of high-end, mid-range and low-end trains
B . After the disaster recovery center fails, the remaining sites automatically establish a replication relationship to provide continuous data protection
C . Huawei’s disaster recovery management software BC Manager provides one-click disaster recovery drill and disaster recovery switch functions, supporting the recovery of the disaster recovery database within a few minutes
D . Flexible selection of off-site disaster recovery center disk arrays to significantly improve the input-output ratio of disaster recovery construction

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Answer: ACD