A strategy of maintaining a union's existing strength in its traditional membership areas through difficult times so it can capture unionization interest when nonunion workers finally become disillusioned with employer behavior is known as:

A) Fortress unionism
B) Nonmajority unions
C) Uplift unionism
D) Union protectionism

Fortress unionism is a strategy where a union focuses on maintaining its existing strength in its traditional membership areas during difficult times, with the hope of capturing unionization interest when nonunion workers become disillusioned with employer behavior. This approach involves a strong defense of current union members and the reinforcement of union standards rather than aggressively seeking to organize new members.