Which command is used to enable OSPFv3 and address families on an interface?

Question:

Which command is used to enable OSPFv3 and address families on an interface?

• R1(config-router)# network [ wildcard_mask | prefix-length ] area area-id
• R1(config-if)# ospfv3 pid { ipv4 | ipv6 } area area-id
• R1(config-if)# { ipv4 | ipv6} ospfv3 area area-id
• R1(config-if)# address-family { ipv6 | ipv4 } unicast

Explanation: The OSPFv3 process is enabled on an interface-by-interface basis in interface configuration mode with the ospfv3 pid { ipv4 | ipv6 } area area-id command.

Exam with this question: CCNP Enterprise: Advanced Routing (Version 8.0) – OSPF Exam