Slavery was so profitable, it sprouted more millionaires per capita in the Mississippi River valley than anywhere in the nation. With cash crops of tobacco, cotton and sugar cane, America's southern states became the economic engine of the burgeoning nation. ... The slave economy had been very good to American prosperity
Answer: the automobile industry
Explanation: In the late nineteenth century, the needs of the American steel industry directly contributed to the further development of all of the following except the automobile industry.
What do you mean??????????????
It's C because the goods DECREASED not increased
