The following routes exist in the Testking router（）

A、R 12.18.8.0/24 [120/1] via 12.18.2., 00:00:10, Serial0

B、R 12.18.11.0/24 [120/7] via 12.18.9.1, 00:00:03, Serial1

C、C 12.18.1.0/24 is directly connected, Ethernet0

D、R 12.18.5.0/24 [120/15] via 12.18.2.2, 00:00:10, Serial0