What are three basic functional requirements when configuring MPLS layer 2 VPLS? (Choose three)

A.
A CE to PE routing protocol must be used to exchange routing prefixes

B.
A full mesh of pseudowire (emulated VC) connections must be used between PE routers

C.
Each PE must have a VFI configured

D.
LDP protocol must be running

E.
Auto discovery is needed to identify endpoints outside of the VPLS domain.