Answer:A. freed every enslaved person living in the United States and the Confederacy.
Explanation:From the first days of the Civil War, enslaved people had acted to secure their own liberty. The Emancipation Proclamation confirmed their insistence that the war for the Union must become a war for freedom. It added moral force to the Union cause and strengthened the Union both militarily and politically.
One reason might the Freedom of Assembly might be limited is to protect the public.
It had a very positive impact because the 1920's was when many new technologies were introduced, one example being the the assembly line, which made many industries more productive and profitable.
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I think it is B, I hope it is help.