Which two implementations are standard Virtual Private LAN Service (VPLS) implementations that
are supported by the IETF? (Choose two)

A.
VPLS uses LDP for signaling.

B.
VPLS uses BGP for autodiscovery and signaling.

C.
VPLS uses extended IS-IS for signaling

D.
VPLS uses OSPF version 3 for auto discovery and signaling

E.
VPLS uses spanning tree for signaling