What are three key features of virtual chassis? (Choose three.)

A.
ability to upgrade all members of a virtual chassis from the master switch

B.
dedicated master and backup routing engines

C.
dedicated active and standby switch fabrics

D.
ability to configure vcp-0 and vcp-1 interfaces to run at various speeds

E.
ability to interconnect members of a virtual chassis using the 10-Gigabit Ethernet uplink ports