Which Cisco product performs virtualized Ethernet switching within a VMware ESX host?（）

A.UCS Manager
B.Viltual Supervisor Module
C.ViItuaI Ethernet Module
D.Distributed Viltual Switch

A.all subcomponents
B.IOM y
C.compute node y
D.mezzanine adapter z in compute node y

A.active / active using spanning tree
B.active / active
C.active / passive using spanning tree
D.active / passive