I think it is C. PLZ tell me if I am wrong
Many former salves expected the federal government to give them a certain amount of land as compensation for all the work they had done during the slave era. During Reconstruction, however, the conflict over labor resulted in the sharecropping system, in which black families would rent small plots of land in return for a portion of their crop, to be given to the landowner at the end of each year.
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Explanation:
Slavery in ancient Rome played an important role in society and the economy. Besides manual labor, slaves performed many domestic services, and might be employed at highly skilled jobs and professions. Accountants and physicians were often slaves. Slaves of Greek origin in particular might be highly educated.
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Slavery in ancient Rome - Wikipedia