Which three methods can be used to reduce the full-mesh IBGP requirement in a service provider core network?

A.	implement route reflectors
B.	enable multi-protocol BGP sessions between all the PE routers
C.	implement confederations
D.	implement MPLS (LDP) in the core network on all the PE and P routers
E.	enable BGP synchronization
F.	disable the IBGP split-horizon rule