Which two options are requirements to implement 6VPE?

Which two options are requirements to implement 6VPE? (Choose two.)

A.
MPLS between PEs

B.
6-in-4 tunnels between PEs

C.
MP-BGP VPNv6 exchange

D.
MP-BGP IPv6+label exchange

E.
Any Transport over MPLS

F.
IPv4/IPv6 dual-stack in core