Refer to the exhibit. A network engineer connected two routers using OSPF but the routers are not sharing routes. Which command completes the configuration?

This is identical to the correct answer.

`interface GigabitEthernet5` is a command to enter interface configuration mode, which is a precursor to configuring OSPF on an interface (e.g., with `ip ospf area`) but does not, by itself, enable the OSPF routing process or allow route sharing.

This is identical to the correct answer.

The command `router ospf 1` is used to enable and start the OSPF routing process on a router. If the OSPF process is not initiated, or if the process ID is mismatched, routers will not be able to form adjacencies or exchange routing information, leading to a failure in sharing routes despite being physically connected.