Which three configuration sections are required on service provider PE routers to enable IPv4 Layer 3 VPN? (Choose three.)
A. Configure route distinguishers that are used for importing and exporting customer VRF routes.
B. Configure at least one interface that is assigned to a customer link as a member of the VRF.
C. Configure the VPNv4 address-family under the MP-BGP configuration mode on the PE routers that participate in the customer VRF routing.
D. Configure route targets that are used for importing and exporting customer VRF routes
E. Advertise customer routes to all PE routers by configuring the IPv4 address-family under the MPBGP configuration mode.
F. Implement MPLS for all customer-facing links.
