Answer & Explanation:
In his “house divided” speech, Lincoln countered that the Dred Scott decision the previous year had already opened the doors for slavery to be legal in the north, as well as all territories that the U.S. expanded into. If the U.S. wanted to be a free country, he argued, it had to act now before it was too late.
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Sharecropping oppressed slaves by being able to work for money from the cropping and labor and to make a share of it and rent a room to live. It helps them for new jobs.
The correct answer is B. Native American.
As the earliest ancestors of Native Americans, they can be considered to be descended from the Paleo-Indians. They shared the use of fire and trained dogs with their Asian counterparts, but grazing animals, domesticated plants, and the wheel did not seem to be Old World innovations.