Which description of BGP authentication is true？（）

• A、MD5 has been used by BGP to encrypt BGP update packets.
• B、BGP uses a message-digest algorithm to authenticate BGP peers
• C、A plain-text password authentication is an option of BGP authentication
• D、EBGP peers authentication is faster than IBGP peers authentication
• E、BGP uses public key and private key to authenticate BGP peers.