网关地址是192.168.1.1，向172.168.0.0网段增加一条路由信息的正确命令是哪个（）

A、routeADD172.168.0.0mask255.255.0.0192.168.1.1

B、routeADD172.168.0.0255.255.0.0192.168.1.1

C、routeADD172.168.0.0255.255.0.0mask192.168.1.1

D、route172.168.0.0mask255.255.0.0192.168.1.1