In the HyperMetro dual-live scenario, the storage for Data Center A and the storage group for Data Center B are built as a cross-site cluster. The following description of the cluster which is correct? (Multiple choice)

In the HyperMetro dual-live scenario, the storage for Data Center A and the storage group for Data Center B are built as a cross-site cluster. The following description of the cluster which is correct? (Multiple choice)
A . All storage in the cluster provides an application server with no difference in parallel access.
B . FC or IP can be used as the communication link between site A and site B in the cluster: The FC link can provide higher transmission efficiency, the IP link is easy to deploy without distance restrictions.
C . Dual-active LUN on two storage arrays in a cluster form a virtual dual-active LU
D . Real-time mirroring keeps real-time data of dual-active member LUN in both data centers in real time.
E . In the cluster, the controllers are equal. When one controller fails, the cluster switches the service to a lighter-loaded controller according to the load of each controller.

Answer: AC