MPLS has the concept of forwarding equivalence class (FEC-Forwarding Equivalence Class), so FEC cannot be allocated based on which of the following standards?

MPLS has the concept of forwarding equivalence class (FEC-Forwarding Equivalence Class), so FEC cannot be allocated based on which of the following standards?
A . Fragment offset
B . Destination Access
C . Application Protocol
D . Class of Service

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Answer: A