I disagree, The cotton gin didn’t cause the prolonging of slavery it was the ignorance of white americans that started the racism in the first place.
Plessy v. Ferguson<span>, 163 U.S. 537 (1896), was a landmark decision of the U.S. Supreme Court issued in 1896. It upheld the constitutionality of racial segregation laws for public facilities as long as the segregated facilities were equal in quality – a doctrine that came to be known as "separate but equal".</span>
DURING RECONSTRUCTION, African Americans had the right to vote! Yay! (B is incorrect.) Due to the sheer numbers of African American voters, African Americans often won political office throughout the South--a big change from before! A is correct!! Keep in mind that while African Americans were elected in the North, the question asks about African Americans in the SOUTH (C is incorrect). Also, minimum wage didn't exist in the United States at the time (D is incorrect).
Answer: A
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Back in WW1 PTSD was treated with courses of electroshock therapy which were typically ineffective. Nowadays we use something called CBT which helps you to manage your problems by changing the way you think and act.
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Hope this helps :D brainliest?