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 PE-router, 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.