Which two design solutions can be applied to ensure that your access routers will be able to reach all devices in your network?

You work as a network designer for a company that is replacing their Frame Relay WAN with an MPLS VPN service, where the PE-to-CE routing protocol is BGP. The company has 3000 routes in their distribution routers, and they would like to advertise their access routers through the MPLS network. Their service provider, however, only supports 1000 prefixes per VRF.

Which two design solutions can be applied to ensure that your access routers will be able to reach all devices in your network? (Choose two.)
A . Use prefix lists on your distribution routers to control which routes are sent to the MPLS network.
B . On your distribution routers, configure null routes and aggregate routes for the prefixes in your network.
C . Configure your distribution routers to send a default route to the MPLS network.
D . Summarize the routes on the MPLS WAN interfaces of your distribution routers.

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Answer: B,C