When a router running BGP receives a route with an unreachable next hop, what should I do?

When a router running BGP receives a route with an unreachable next hop, what should I do?
A . Send an error message to the router that issued the Update.
B . Refused to join the BGP routing table and silently discarded.
C . Receive the route and add it to the BGP routing table. But this route will not be preferred by BGP and will not join the IP routing table.
D . Receive the route, join the BGP routing table, and participate in the BGP routing rules. It may be optimized as the best route and join the IP routing table.

View Answer

Answer: C