Which names are reserved when custom roles are created in Cisco UCS Manager RBAC?

A.
network-admin, network-operator,vdc-admin, vdc-operator,and server-admin

B.
cisco, cisco123, cisco-operator,cisco-admin, and root

C.
ucs-admin, ucs-operator,server-admin, server-operator,and cisco-admin

D.
ucs, ucs123, server-admin, server-operator,and sysroot