Which amendment abolished slavery in the United States?

• A. The Thirteenth Amendment
• B. The Fourteenth Amendment
• C. The Fifteenth Amendment
• D. The Twelfth Amendment

Answer: (A)

The main idea being tested is which constitutional change specifically ends slavery across the United States. The amendment that bans slavery and involuntary servitude in all U.S. territory and places under jurisdiction — with only a punishment-for-crime exception — directly establishes abolition in the Constitution. That makes it the correct choice. After abolition, other amendments expanded rights by addressing citizenship and equal protection, or voting rights, rather than abolishing slavery itself. An amendment about presidential elections falls outside this issue, so it isn’t the correct one.