Which is NOT a possible function of BGP in an MPLS VPN environment?

Which is NOT a possible function of BGP in an MPLS VPN environment?

A.
The exchange of traditional global IPV4 routes.

B.
The distribution of labels throughout the P network.

C.
The exchange of VPN routes with a customer using either EBGP or redistribution to another protocol.

D.
The exchange of VPNv4 routes.