R1 and R2 share the same Fast Ethernet connection. OSPFv3 is configured on each interface, but
the adjacency is not being established.
Review the configuration provided. Which option explains why the OSPFv3 adjacency is not
coming up?
R1
Interface fastethernet 0/0
ipv6 address 2001:db8:1234:1::1/64
ipv6 ospf 1 area 0 instance 2

ipv6 enable
ipv6 router ospf 1
router-id 1.1.1.1
R2
Interface fastethernet 0/0
ipv6 address 2001:db8:6789:9::1/64
ipv6 ospf 2 area 0 instance 3
ipv6 router ospf 2
router-id 2.2.2.2

A.
The two routers are not on the same subnet.

B.
IPv6 is not enabled on R2 Fast Ethernet 0/0.

C.
There is no reachability to 1.1.1.1 or 2.2.2.2.

D.
The OSPFv3 processes do not match.

E.
The instance IDs do not match.