Which of the following is primarily concerned with a person's citizenship?

National identity is primarily concerned with a person's citizenship because it refers to the sense of belonging and identity associated with a particular nation. This concept encompasses aspects such as shared culture, language, history, and political associations that come with being a citizen of that nation. It plays a critical role in how individuals see themselves in relation to their country and often influences their legal rights, responsibilities, and social status. While social class identity, racial identity, and religious identity may intersect with national identity, they focus more on specific socio-economic classes, ethnic backgrounds, and belief systems, rather than the legal or civic status tied to citizenship. Therefore, national identity stands out as the most direct connection to a person's citizenship.