Answer: A.) grew rapidly as people move to urban centers looking for work.
During that time period, the country experienced rapid economic growth, particularly in the North and West. The industrialization of cities attracted migrants from rural areas, who were looking for better wages. Moreover, it attracted immigrants, particularly from Europe, hoping to improve their lives in America. The enormous influx of immigrants meant that it was also a time of poverty and inequality. Many people from impoverished regions arrived to the main cities, but faced precarious work and bad living conditions.