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Which of these were effects of mass production techniques used during 1920s

What were three advantages the north had in the civil war? it was fighting most battles on home ground. it had a greater number of soldiers. it had more highly skilled military leaders. it had a stronger navy. it had a better network of railroads. pick three .

How did bacon's rebellion affect relations between colonists and native americans? a. relations improved after many were disgusted by the violence of the rebellion. b. after the rebellion, colonists placed less focus on the "indian problem."c. the rebellion showed many that in order to establish better relations between colonists and native americans,  slavery  had to be legalized. d. more colonists supported an armed expansion into native american territory.