You want to set up a last resort route and prevent route lookups in either the source-based routing
table or the destination-based routing table.
What should you do?

A.
Disable SIBR and create a default route in the trust-vr table using the null interface as the
outgoing interface with a higher metric than other routes.

B.
Disable SIBR and create a default route in the trust-vr table using the null interface as the
outgoing interface with a lower metric than other routes.

C.
Enable SIBR and create a default route in the SIBR table using the null interface as the outgoing
interface with a higher metric than other routes.

D.
Enable SIBR and create a default route in the SIBR table using the null interface as the outgoing
interface with a lower metric than other routes.

Explanation: