National Standard Company (NSC)products Are Identified with a Trade?mark

National Standard Company (NSC) products are identified with a trade?mark.For several years,NSC al?lows others to use the mark without permission and without protest.This may be deemed,on NSC's part,

A) abandonment of the mark.
B) anticompetitive conduct.
C) liability for misleading consumers.
D) liability for misleading competitors.