What amendment says all persons born or naturalized in the United States, and subject to the jurisdiction thereof, are U.S. citizens?

Correct answer to question 97: 14th Amendment

Why

The 14th Amendment, ratified in 1868, made people born or naturalized in the United States and subject to its jurisdiction citizens, and guaranteed them equal protection of the laws. It was written after the Civil War to secure citizenship for formerly enslaved people.