Answer:
The correct answer is letter B. The significance of the Railway Labor Act is that it set the stage for national legislation that protected workers’ rights to unionize and bargain collectively.
Step-by-step explanation:
The Railway Labor Act (RLA), from 1926 guaranteed the workers’ right to unionize, to organize and bargain in the railroad industry, they could do it collectively through representatives chosen by their own category. The railroad industry, specifically the rail transportation was very important in the national economy, thus the law was limited to the railway labor at first. After, in 1964, the RLA was extended to employers and workers in the air transportation sector as well. Until today the RLA cover about one million workers.