A、A.The next-hop 172.30.25.1 is selected because the address has the lowest value. B、B.The next-hop 172.30.25.1 is selected because it is listed first. C、C.The next-hop 172.30.25.1 is selected because it is the lowest protocol preference. D、D.The next-hop 172.30.25.5 is selected because it is the lowest protocol preference.