Which amendment instituted Prohibition, making alcohol illegal?

• A. 18th Amendment
• B. 19th Amendment
• C. 21st Amendment
• D. 20th Amendment

Answer: (A)

The main idea being tested is how Prohibition was established in the U.S. Constitution. Prohibition was created by an amendment that bans the manufacture, sale, and transportation of alcoholic beverages nationwide. This is why it’s the best answer: it directly describes the action that makes alcohol illegal, which is exactly what Prohibition is.

The other options point to different purposes: one amendment gave women the right to vote, another changed the start dates for presidential terms, and another later repealed Prohibition, allowing alcohol again. None of those describe the creation of Prohibition itself.