The VPN named my_vpn is operating on interface s0/0 a PE-router. The CE-PE routing protocol is
RIP. The MPLS backbone IGP is OSPF. However, when you review the configuration for the PErouter, you find that BGP has been configured.
What explains this configuration?

A.
VPN routes are always imported an exported using MP-BGP.

B.
This router is configured improperly. BGP is not needed in this configuration.

C.
This router is configured improperly E-BGP is the required routing protocol between PE and
CE-routers.

D.
BGP should be configured on all routers supporting MPLS to ensure backward-compatibility
reasons for earlier versions of IOS.

Explanation:
This is very basic. Uou ALWAYS need bgp running on an MPLS PE router.