如果对于整个网络配置ospf协议(area 1),使其相互实现互通,则下列路由器的配置正确的有:( )
A.
R1(config)# router ospf 100 R1(config-router)# network 192.168.1.0 0.0.0.255 area 1 R1(config-router)#network 192.168.2.0 0.0.0.255 area 1 R1(config-router)# network 192.168.3.0 0.0.0.255 area 1
B.
R2(config)# router ospf 200 R2(config-router)# network 192.168.5.0 255.255.255.0 area 1 R2(config-router)# network 192.168.6.0 255.255.255.0 area 1
C.
R3(config)# router ospf 700 R3(config-router)# network 192.168.4.0 0.0.0.255 area 1
D.
R4(config)# router ospf 2 R4(config-router# # network 192.168.5.0 0.0.0.255 area 1 R4(config-router# # network 192.168.7.0 0.0.0.255 area 1