A new router, named TK1, is being installed. You wish to add this router to your existing OSPF network. In doing so, you configure the following: TK1(config)# router ospf 1 TK1(config-router)# network 10.10.10.0 255.255.255.0 area 0 After making this change, you notice that the networks attached to TK1 are not being learned by the other OSPF routers. What could be the cause of this?（）

• A、The AS is not correctly configured
• B、The network subnet mask is incorrectly configured
• C、The network wildcard mask is configured incorrectly
• D、The network number is not correctly configured
• E、The process id is configured incorrectly
• F、None of the above