A.ip route 192.168.0.0255.255.255.0 61.235.1.1
B.ip route 192.168.0.0255.255.255.0 s0/0
C.ip route 0.0.0.0 0.0.0.0 61.235.1.1
D.ip route 0.0.0.0 0.0.0.0 s0/0