Refer to the exhibit.

This is an MPLS VPN network with OSPF as the PE-CE routing protocol. Which statement is
correct?

A.
The routing inside the VPN RED will never work correctly.

B.
The routing inside the VPN RED can be enabled by configuring virtual links between the PE
routers.

C.
The routing inside the VPN RED can be enabled by configuring area 0 inside the VRF on the
PE routers.

D.
The routing inside the VPN RED will work without any special OSPF configuration.

E.
The routing inside the VPN RED will work if the PE routers have a full mesh of sham-links
configured for VRF RED.

Explanation:
http://www.cisco.com/en/US/docs/net_mgmt/vpn_solutions_center/1.1/user/guide/VPN_UG1.html