Final answer:
A person can gain US citizenship through naturalization by living in the U.S. for a designated period and meeting specific legal and residency requirements, not by just being born on U.S. soil, having U.S. citizen parents, or holding a temporary work visa.
Step-by-step explanation:
Understanding US Citizenship by Naturalization
A person can gain US citizenship by naturalization under the scenario: C) Living in the U.S. for a designated period and meeting specific requirements. Gaining citizenship via naturalization involves a multi-step process where a noncitizen meets certain criteria, including holding a status of a permanent resident, living in the US for a certain period, demonstrating good moral character, and having a basic knowledge of U.S. history and government. To apply, one must complete the application form from the United States Citizenship and Immigration Services (USCIS), the N-400 form. This process is distinct from being a natural born citizen, which refers to those who are entitled to citizenship by birth either on U.S soil or to U.S. citizen parents.