Refer to the exhibit. Two routers are connected by Frame Relay and are running OSPF bet ween them. Each router has been configured with the appropriate network statements under router ospf 1, but the routers are not forming an adjacency. Which of the following three commands could be configured on each router to correct this problem?（）

• A、RouterC(config - if)#ip ospf network broadcast   RouterD(config - if)#ip ospf network broadcast
• B、RouterC(config - if)#ip ospf network point - to - point   RouterD(config - if)#ip ospf network point - to - point
• C、RouterC(config - router)#neighbor 10.100. 100.4   RouterD(config - router)#neighbor 10.100.100.3
• D、RouterC(config - router)#neighbor 10.255.255.254   RouterD(config - router)#neighbor 10.255.255.253