What is the advantage of BGP confederation compared to BGP route reflector implementation?
A. Confederation provides better redundancy. Route reflector clients can peer to only one cluster
B. Confederation allows use of template session and template policy. Route reflector can use only peer-group
C. The IBGP policies can differ internally within and between the sub-autonomous systems
D. Confederation is more scalable. Route reflector implementation still requires confederation to eliminate completely the full mesh requirement
