To become a citizen of the United States, you must
A. have lived in the United States for at least six months. B. be at least 21 years old. C. pass an English and government test. D. file a request form in a federal court.
To become a U.S. citizen, you need to be at least 18 years. You should have lived in the U.S. for at least 5 years.(these steps are for naturalization). So the answer is probably D. Hope i helped.