Answer:
A. Being at least 18 years of age.
Explanation:
Becoming a naturalized citizen of the United States means attaining the legal citizenship of the country. And for a person to be naturalized, there are certain rules or requirements, some of which are listed below.
First, a person has to be at least 18 years of age to be naturalized as a citizen. Also, the person must have stayed or lived in the United States for a minimum of three to five years, depending on the naturalization category applied for. Also, a person must be able to read, write, and speak in English.
Thus, the correct answer is option A.