In the late 1800s, the growth of the railroad system led Midwestern cities such as Minneapolis and Cleveland to become industrial centers.
I would say a. sioux indian attacks on stagecoach lines.
Answer:
Workers endured long hours without rest breaks, had little access to water or restrooms, had toxic pesticides sprayed on them, and endured hard labor for very little pay and no health benefits. These injustices communicated to the workers that they were subhuman and not deserving of even the most common dignities offered to others