Which statements are true regarding the Cisco UCS fabric failover feature？ （）

• A、 FabricSync is used to synchronize MAC addresses to an adjacent fabric interconnect after a server interface failover.
• B、 Gratuitous ARPs are sent on fabric interconnect uplinks after a server interface failover. 
• C、 Fabric failover can be used on vNICs and vHBAs.
• D、 Fabric failover is configured as part of the service profile.
• E、 Fabric interconnects in end-host mode use fabric failover instead of spanning tree to provide redundancy on uplink ports.