Which OSPFv3 router ID is valid?

A.
192.168.1.1

B.
::192.168.1.1

C.
0.0.0.0

D.
2008:db8::1

Explanation:
OSPFv3 Router IDs, Area IDs, and LSA link-state IDs remain at the OSPFv2 IPv4 size of 32 bits.
Network Configuration Example OSPF Version 3 for IPv6 Feature Guide, page 3