Where are MPLS point-to-multipoint traffic engineering packets replicated？（）

A.Clusters are used in confederation schemes to avoid loops.
B.BGP network can have a confederation within a route reflector area.
C.An internal BGP network cannot have a route reflector within a confederation.
D.An internal BGP network can have a route reflector within a confederation.
E.Clusters are used in route reflector schemes to avoid loops.
F.BGP network cannot have a confederation within a route reflector area.

A.It supports fast synchronization at starting and before network failures
B.It supports automatic server discovery
C.It uses a fixed-point arithmetion
D.It supports the "nanokernel" kernel implementation
E.It does not support Public-Key Cryptography