Which three statements are correct regarding the OSPF operations? line (Choose three.)

A.
PE5 OSPFv2 and OSPFv3 router id is 10.5.1.1

B.
The OSPF virtual-link cost is 1

C.
Area 3 is a transit area

D.
Area 4 is using MD5 authentication

E.
Area 1 IPv4 and IPv6 networks are not reachable from PE6

Explanation:
#show ip protocols
#show ip route ospf
#show ip ospf interfaces
#show ip ospf neighbors
#show ip ospf database
#show ip ospf border-routers
#show ip ospf
#show ip route
#show ip protocols