Final answer:
The 21st Amendment returned the authority to regulate alcohol to the states.
Step-by-step explanation:
The 21st Amendment, passed in 1933, repealed the 18th Amendment, which had prohibited the sale, production, and transportation of alcoholic beverages. Therefore, the correct option for this question is: Returned the authority to regulate alcohol to the states. This means that after the 21st Amendment, each state regained the power to regulate alcohol within its own borders, which resulted in the variety of alcohol laws we see today in different states.
Learn more about The 21st Amendment and its impact on regulating alcohol.