Final answer:
The 21st amendment repealed the 18th amendment, which banned the sale and transportation of alcohol in the United States during the Prohibition era.
Step-by-step explanation:
The 21st amendment repealed the 18th amendment. The 18th amendment, also known as Prohibition, banned the manufacture, sale, and transportation of alcoholic beverages in the United States. With the ratification of the 21st amendment, prohibition was officially ended, allowing the legal consumption and distribution of alcohol once again.
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