Unions Are Less Likely to Strike Today Than in the Past

Unions are less likely to strike today than in the past because

A) real wages have increased over the last 20 years
B) employers are less willing to hire strike breakers
C) most workers in the U.S.are already union members
D) more workers, both union and nonunion, are willing to cross picket lines
E) many high-profile strikes (e.g., Caterpillar) have succeeded in winning job security