【多选题】
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.
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