What are two purposes of VIFs in Data Center Unified Fabric? (Choose two.)

A.
VIF can be used to virtually present NICs to the operating system

B.
VIF is created when interconnecting Catalyst switches to Nexus switches

C.
FEX modules can be connected to Nexus parent switches through VIF

D.
VIF can be used to directly attach virtual machines with a Unified Computing System

E.
VIF creates multiple switch instances inside a VDC