C. the expansion of Americas across the continent :)
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Based on the information on the map, <span>Population levels in the Midwest made it difficult to support the amount of labor required to industrialize. The answer is D. </span>
<span>- Granted full freedom for more than 3 million slaves in Confederate areas which still conducted rebellion towards the union- Promised that the federal government and military would "recognize and maintain the freedom" in order to protect the status of the former slaves as a free man.- Fail to free around 500,000 slaves in the border states that did not rebelled to the union(Missouri, Delaware, Maryland, andKentucky) </span>