Question

the american federation of labor became the first long - lasting, successful labor union in the united states mainly because it (ssush11e) concentrated on organizing workers in industries in the south fought for the rights of skilled workers

Explanation:

The American Federation of Labor (AFL) focused its efforts on organizing skilled workers, which allowed it to build stable, long-term unions with more leverage, unlike earlier unions that often included unskilled workers and faced more frequent defeats and instability. The option about Southern industries is incorrect because the AFL was centered in Northern industrial areas.

Answer:

fought for the rights of skilled workers