What was National Prohibition in the United States, and during what period was it in effect?
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A
A voluntary pledge by major brewers to reduce alcohol content, 1918-1925
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B
A federal constitutional ban on the manufacture and sale of alcohol, 1920-1933
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C
State-level taxation designed to reduce alcohol consumption, 1910-1940
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D
A wartime grain conservation restriction limiting brewing, 1917-1920