Which of the following are true about railroad expansion in the late 19th century choose all that
apply:
1. Railroad expansion greatly impacted the economic development of the United States.
2. The expansion of railroads led to the development of new industries and markets.
3. Railroads played a significant role in westward expansion and the settlement of the American frontier.
4. Railroad expansion led to the transformation of cities and towns along their routes.
5. The expansion of railroads resulted in the growth of a national market and increased trade between regions.
6. Railroad expansion contributed to the rise of big businesses and monopolies in the United States.
7. The construction of railroads required immense amounts of labor and led to the influx of immigrants.