Why did the south support the idea of cheap western land?

a) they could expand the plantation system and slavery.

b) they could acquire cheap labor to work the land.

c) it would decrease the price of manufactured goods.

d) it would increase slave trade with africa.

Four score and seven years ago our fathers brought forth on this continent a new nation, conceived in liberty, and dedicated to the proposition that all men are created equal. —"the gettysburg address," abraham lincoln which quotation correctly uses an ellipsis to shorten lincoln’s words?