What is the solution of the fault condition?

What is the solution of the fault condition?
A . enable OSPF Authentication on the S0/0/0 interface using the ip ospf authentication messagedigest command
B . enable OSPF routing on the s0/0/0 interface using the network 10.1.1.0 0.0.0.0.255 area 12 command
C . enable OSPF routing on the s0/0/1 interface using the network 209.65.200.0 0.0.0.255 area 12 command
D . redistribute the BGP routes into OSPF using the redistribute BGP 65001 subnet command.

View Answer

Answer: A

Explanation:

R2 is correctly configured for OSPF authentication, including the "ip ospf authentication message-digest" command listed properly under the sub-interface Serial0/0/0.12. R1 is missing this command.