Which of the following are true about the railroad expansion in the late 19th century? Choose all that apply
1. The expansion of railroads helped spur economic growth and development in the United States.
2. Railroads played a crucial role in connecting different regions and facilitating the movement of goods and people.
3. The expansion of railroads led to the creation of new jobs, particularly in construction and maintenance.
4. Railroads were largely privately funded and built by corporations seeking to profit from increased trade and transportation.
5. The expansion of railroads led to the displacement and mistreatment of Indigenous peoples whose land was seized for railroad construction.