Which of the following is NOT a requirement to apply for citizenship?

The correct answer is the option indicating a requirement that does not align with the established criteria for U.S. citizenship. To be eligible for citizenship through naturalization, an applicant typically must have resided in the U.S. for at least five years (or three years if married to a U.S. citizen). This makes the option about living in the U.S. for at least three years incorrect as a non-requirement.

The other requirements are essential in the naturalization process. Taking the oath of allegiance is a fundamental step where the individual pledges loyalty to the United States and renounces allegiance to other countries. The ability to speak and understand English is critical, as applicants must demonstrate basic proficiency in the language, which is essential for integration into American society. Additionally, obeying the law is a vital principle, as individuals with significant legal infractions may jeopardize their citizenship applications. Thus, the response accurately reflects the lack of validity regarding the specified residency duration in the context of U.S. citizenship application requirements.