How did railroads promote economic expansion in the U. S.

Railroad expansion affected the US economy by creating jobs, establishing a national market, establishing a cattle industry on the Plains, and allowing certain people to acquire great wealth through investing in the railroad.

Explanation:

This is all I know.

Hope it helps~

Good luck!!!

in griswold v. connecticut (1965), the supreme court ruled that a state's ban on the use of contraceptives violated the right to marital privacy.

"i care deeply about campaign finance reforms: - apex