Which statement about OSPF authentication is true？（）

• A、To enable OSPF authentication in a network， OSPF area 0 authentications must be enabled first
• B、The payload of OSPF version 3 packets contains no authentication information
• C、OSPF version 3 supports Advanced Encryption Standard
• D、OSPF version 3 uses router ID as a key to encrypt OSPF hello packets
• E、OSPF MD5 authentication uses TCP， and Plan Test authentication uses UDP