Answer:
Harriet Beecher Stowe was a world-renowned American writer, staunch ... she was best known for her novel, Uncle Tom's Cabin Or, Life Among the Lowly, which ... This, and a visit to a Kentucky plantation, fueled her abolitionist fervor. ... Uncle Tom's Cabin brought slavery into the limelight like never before, ...
Explanation:
This is because after winning independent slave trade also was in that event, or because Europeans wanted to influence Christians into Africa.
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The federal legislature or congress can repeal the state laws under the necessary and proper clause in order to impose federal laws necessary to provide general welfare and common defense of the nation because they have the authority to do so. This authority was given to them because the people believed that the congress would decide for the common good.
Moreover, only the federal legislature has the right to contract debts, lay taxes and if they believed that a state law may prevent the collection of a federal tax, then they can repeal state laws making sure that it is for the benefit of the United States.