The use of labor-saving devices in industry and agriculture. So b is the correct answer
Railroads brought crops and food to cities in the East, and settlers to farms in the Great Plains
Manifest destiny was a belief that many Americans had that we should expand and control the land between the atlantic ocean and the pacific ocean. they believed it was our destiny to control this land eventually people believed we should spread the idea of manifest destiny world wide
The victory at the battle of Antietam gave Abraham Lincoln a platform to issue the Proclamation from a position of strength. This changed the character of the Civil War and prevented the European powers from intervening on behave of their trading partners of the Southern Confederacy.
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PLS MARK AS BRAINLIEST
Do you go to bva????
and its the second one.
