Which statement about high-availability clusters for Cisco UCS Fabric Interconnects is true?

Which statement about high-availability clusters for Cisco UCS Fabric Interconnects is true?
A. Peers in a cluster must connect to each other by using two 10-Gbps links.
B. The cluster requires a minimum of two IP addresses.
C. The management plane is active/standby.
D. The data plane is active/standby.