Amendment was the first government definition of a citizen. answer = fourteenth amendment

Citizenship is defined in the first clause of the first section of the Fourteenth Amendment as: All persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States and the State wherein they reside.

So that is correct. However, please tell me if this is not what you need help on, I am confused why you did this if you had the answer.