Final answer:
The reason for the Prohibition Amendment was a desire to reduce alcohol consumption. Therefore, the correct option is B. a desire to reduce alcohol consumption.
Step-by-step explanation:
The reason for the Prohibition Amendment was a desire to reduce alcohol consumption. Organizations like the Women's Christian Temperance Union and the Anti-Saloon League believed that alcohol consumption led to societal problems such as abuse, corruption, and inefficiency.
They worked tirelessly to limit or prohibit alcohol on a local scale and saw an opportunity for federal action during the war. The Eighteenth Amendment, ratified in 1919, prohibited the manufacture, sale, and transportation of alcohol.