Which configuration implements the most secured OSPF authentication mode on Cisco IOS XE?

A.	interface Gi0/0/0/0 ip ospf authentication message-digest ip ospf message-digest-key 1 md5 cisco
B.	router ospf 1 area 1 authentication message-digest interface GigabitEthernet0/0/0/0 message-digest-key 1 md5 cisco
C.	router ospf 1 area 1 interface GigabitEthernet0/0/0/0 authentication message-digest message-digest-key 1 md5 cisco
D.	router ospf 1 area 1 authentication interface GigabitEthernet0/0/0/0 ip ospf authentication-key cisco
E.	interface Gi0/0/0/0 ip ospf authentication ip ospf authentication-key cisco