Which two statements are true regarding redundancy groups? （）(Choose two.)

A. When priority settings are equal and the members participating in a cluster are initialized at the same time, the primary assigned to node 0.
B. The preempt option determines the primary and secondary roles for redundancy group 0 during a failure and recovery
C. Redundancy group 0 manages the control plane failover between the nodes of a cluster.
D. The primary role can be shared for redundancy group 0 when the active-active option is enabled.