What is the name of the label applied to packets to allow routers to know where to forward in an MPLS network

Answer options:

A.BFD
B.BGP
C.DSCP
D.FEC

Answer - D
A Forwarding Equivalence Class (FEC) is a term used in Multiprotocol Label Switching (MPLS) to describe a set of packets with similar and / or identical characteristics which may be forwarded the same way; that is, they may be bound to the same MPLS label.
For more information please refer to the below URL:
https://en.wikipedia.org/wiki/Forwarding_equivalence_class