What is the first step in BGP route selection?（）

• A、The local router prefers the route with the shortest as-path.
• B、The router first verifies that it has a route to the bgp Next Hop IP address.
• C、The local router prefers the route from the peer with the lowest peer id address.
• D、The local router prefers the route learned from an ebgp peer over a route learned from an ibgp peer.