Which new kind of energy changed transportation and industry in america during the early to mid-1800s?

Brainliestttme : ) what demographic changes occurred after world war ii?

What is the term for a short statement about history that has not been yet been proved

How did the g. i bill affect colleges? a. it increased demand for teachers b. it increased demand for support workers on campuses. c. it increased demand for construction on campuses d. all of the above