When a router running BGP receives a route with an unreachable next hop, how to deal with it?

When a router running BGP receives a route with an unreachable next hop, how to deal with it?
A . Send an error message to the router that issued the Update.
B . Refuse to join the BGP routing table, and silently discard it.
C . Receive the route and add it to the BGP routing table. But this route will not be preferred by BGP and will not be added to the IP routing table.
D . Receive the route, add it to the BGP routing table, and participate in the BGP routing rules. It may be selected as the best route and add it to the IP routing table.

View Answer

Answer: C