What is one qualification that must be fulfilled for operson to become o US. citizen? Demonstrating an nderstanding of the constitutions of each Earning on income bove the notional overage Eorning an advanced degree from an Americon university Demonstrating on under standing of the principles ples of American government

## Step 1<br />The question is asking for one of the qualifications that must be fulfilled for a person to become a US citizen. The options provided are:<br />- Demonstrating an understanding of the constitutions of each<br />- Earning an income above the national average<br />- Earning an advanced degree from an American university<br />- Demonstrating an understanding of the principles of American government<br /><br />## Step 2<br />The first option, "Demonstrating an understanding of the constitutions of each", is not a requirement for US citizenship. The US Constitution is the supreme law of the United States, and understanding it is not a requirement for citizenship.<br /><br />## Step 3<br />The second option, "Earning an income above the national average", is also not a requirement for US citizenship. The ability to earn a certain income level is not a criterion for citizenship.<br /><br />## Step 4<br />The third option, "Earning an advanced degree from an American university", is not a requirement for US citizenship. While having an advanced degree may make it easier to obtain citizenship, it is not a requirement.<br /><br />## Step 5<br />The fourth option, "Demonstrating an understanding of the principles of American government", is a requirement for US citizenship. Applicants for US citizenship must demonstrate an understanding of the principles of American government, including the rights and responsibilities of citizens.