Final answer:
The unintended consequence of prohibition was the rise of organized crime, with underground gangs making and selling alcohol at high profits. This resulted in the growth of criminal syndicates and increased corruption among law enforcement officials.
Step-by-step explanation:
An unintended consequence of prohibition was the rise of organized crime. With the banning of alcohol, underground gangs seized the opportunity to make and sell liquor at high profits. This led to the growth of criminal syndicates, such as Al Capone's empire in Chicago, and increased corruption among law enforcement officials.