Citizenship refers to the a status or position someone has pertaining to a particular country. For example anyone born in Nigeria, is a citizen of Nigeria and he hold a citizenship to Nigeria, there are ways by which you can be a citizen of Nigeria, through birth or nationalization, or through your parents who are citizens or you been the country for some certain period of time. but what refers to citizenship from the question above is some who is actively involved in the activities of a country or community or even a state. Relating my answer to the options above, the best answer is Option A
I would agree that the main reason was that we wanted to protect a country from communism. I often wonder though if the Vietnam conflict was not more of a conflict between USSR and the United States than it was a conflict between North and South Vietnam.
