Which command will start an OSPFv3 process with an ID of 4?

A. Router(config)#router ospfv3 4
B. Router(config)#ip router ospfv3 4
C. Router(config)#ipv6 router ospf 4
D. Router(config)#router ospf3 4

C. The command ipv6 router ospf 4 will start an IPv6 process with an ID of 4. Most IPv6 commands will start with ipv6.