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

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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 BGP.
C. A full mesh of IBGP sessions are required between all of the PE and P routers to ensure proper packets forwarding.
D. The PE and P routers run LDP to learn the labels for reaching the BGP next-hop addresses.