You have commissioned a new AFF A250 MetroCluster over IP configuration. Your company requires an automatic switchover to the surviving site in case of a site disaster.

What do you need to configure to fulfill this requirement?

A. ONTAP Mediator service

B. cluster failover

C. automated unplanned switchover

D. storage failover

Reference: https://docs.netapp.com/us-en/ontap-metrocluster/pdfs/sidebar/Install_a_MetroCluster_IP_configuration.pdf (3)