Which two of the following statements are correct regarding LSPs? (Choose two.)

A.
An LSP is created for every routing protocol entry.

B.
Each LSP is bidirectional, that is, packets traveling in the opposite direction use the same LSP.

C.
An IGP is used to populate routing tables in all routers in an MPLS domain.

D.
LDP is used to propagate labels and build LSPs.

E.
The FIB is used to forward MPLS-labeled packets down an LSP.