What are two characteristics of BGP confederations? (Choose two)

What are two characteristics of BGP confederations? (Choose two)

A.
All routers within the BGP confederation must support BGP confederations.

B.
The member AS numbers used with the confederation are visible from outside the confederation.

C.
An Intra-Confederation EBGP session behaves like an EBGP session when propagating routing updates.

D.
Intra-Confederation EBGP neighbors must be directly connected or ebgp-multihop must be configured.