In JUNOS software， which type of encapsulation is required on a PE router for the CE-facing interface in a Martini-based VPN？（）

A.To interconnect VLANS
B.To interconnect ATM VCs
C.To interconnect MPLS LSPs
D.To interconnect MPLS VPNs

A.IGP
B.LDP
C.BGP
D.RSVP

A.Circuit ID
B.VPN label
C.Route target
D.VPN number
E.Route distinguisher