Which three statements about the BGP next-hop attribute are true？ （）

• A、EBGP sessions between confederation sub ASs do not modify the next-hop attribute.
• B、By default， iBGP sessions change the next-hop attribute learned from eBGP peers to self address.
• C、By default， the next-hop attribute is not changed when a prefix is reflected by the route reflector
• D、EBGP sessions between confederation sub ASs change the next-hop attribute to peer address.
• E、By default， iBGP sessions preserve the next-hop attribute learned from eBGP peers.