Why do you think that westward expansion is important in the study of african-american history?

This expansion led to debates about the fate of slavery in the West, increasing tensions between the North and South that ultimately led to the collapse of American democracy and a brutal civil war.

Explanation:

either d or b, i'm not to sure. but my gut tells me it's prob going to be b

major cities in delaware colony included wilmington and georgetown. major towns in new jersey colony included trenton and princeton. major towns in pennsylvania colony included philadelphia, lancaster, and york. major industry in the middle colonies included farming, forest and timber, coal, furs and iron ore.