which of the following are true about railroad expansion in the late 19 century choose all that apply

- Railroad expansion greatly facilitated the growth of industry and commerce in the United States.

- The government played a significant role in promoting and subsidizing railroad expansion.
- Railroad companies often engaged in corrupt and monopolistic practices, such as price fixing and kickbacks to politicians.
- Railroad expansion led to the displacement and exploitation of Native American communities, who were forcibly relocated and relegated to reservations.
- The construction and maintenance of railroads was labor-intensive and dangerous work, with high injury and mortality rates for workers.