Within an MPLS domain, which table is used by the ingress edge LSR to make forwarding decisions when an unlabeled IP packet is received?

Within an MPLS domain, which table is used by the ingress edge LSR to make forwarding decisions when an unlabeled IP packet is received?
A . FIB
B . LFIB
C . LIB
D . MP-BGP
E . VRF

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Answer: A