Most slaves lived on plantations, but the plantations were not very big: they rarely had more than 100 slaves. The best answer is then A. lived on plantations with 20 or more slaves.
Children of the 1930s were at least protected under child labor reform measures of the 1920s, which limited their workday to eight hours and provided guidelines for employment of minors. Many children were self-employed, collecting junk to sell or doing odd jobs for neighbors.
Easy to grow we had more plants to process the cotton
I think its the availability of good jobs in the North and West.
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