Which two statements are correct in describing ISP environments that are running IP/MPLS in the core network? (Choose two.)

Which two statements are correct in describing ISP environments that are running IP/MPLS in the core network? (Choose two.)
A . On the PE routers, each BGP route must use a unique label to reach the BGP next hop.
B . The BGP next hops point to the PE routers, and only the PE routers are required to run BG
D . A full mesh of IBGP sessions are required between all of the PE and P routers to ensure proper packets forwarding.
E . The PE and P routers run LDP to learn the labels for reaching the BGP next-hop addresses.

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Answer: B,D