Correct Option: B. Must have resided in the U.S. for at least 5 years Detailed Explanation: Naturalization is the process through which a foreign national can become a U.S. citizen. The requirements for naturalization are outlined by the U.S. Citizenship and Immigration Services (USCIS). One of the key requirements is that an applicant must have resided in the United States for a certain period of time.

1. Residency Requirement:
2. To be eligible for naturalization, an applicant must have been a lawful permanent resident (green card holder) for at least 5 years. This means that they must have lived in the U.S. continuously for this duration.
3. For those who are married to a U.S. citizen, the residency requirement is reduced to 3 years. However, the standard requirement for most applicants is indeed 5 years.
4. Why Option B is Correct:
5. The 5-year residency requirement ensures that applicants have a substantial connection to the U.S. and understand its culture, laws, and responsibilities of citizenship. This period allows individuals to integrate into American society and demonstrate their commitment to the country.

Why the Other Options are Wrong or Weaker:

• Option A: Must have a high school diploma:
• This statement is incorrect. There is no educational requirement for naturalization. While having a high school diploma may be beneficial for understanding the civics test and the English language requirement, it is not a prerequisite for becoming a U.S. citizen. Applicants can be naturalized regardless of their educational background.
• Option C: Must be a minimum age of 21:
• This option is misleading. The minimum age for naturalization is actually 18 years. Individuals who are 18 years or older can apply for naturalization, provided they meet all other requirements. Therefore, this option is incorrect.
• Option D: Must demonstrate proficiency in a foreign language:
• This statement is also incorrect. In fact, applicants must demonstrate proficiency in English, not a foreign language. They must be able to read, write, and speak basic English, as well as pass a civics test that covers U.S. history and government. There are exceptions for older applicants or those with certain disabilities, but proficiency in a foreign language is not a requirement.

Summary of Key Points:

• The correct requirement for naturalization is that an applicant must have resided in the U.S. for at least 5 years (or 3 years if married to a U.S. citizen).
• There are no educational requirements, and the minimum age for application is 18 years.
• Proficiency in English is required, not a foreign language.
• Understanding these requirements is crucial for anyone preparing for the naturalization process.