When nonadjacent LDP neighbors are used for implementing an MPLS traffic engineering
solution, how are the nonadjacent LDP neighbors discovered?

A.
using multicast CR-LSP (constraint-based LSP)

B.
using unicast CR-LSP (constraint-based LSP)

C.
using multicast LDP hello messages

D.
using unicast LDP hello messages

E.
using multihop MP-IBGP

F.
using multihop MP-EBGP