Residing in an area for a specified period of years is one of the basic conditions to acquire citizenship through
marriage
honour
naturalization
birth
Correct answer is C
Naturalization is the legal act or process by which a non-citizen of a country may acquire citizenship or nationality of that country. It may be done automatically by a statute, i.e., without any effort on the part of the individual, or it may involve an application or a motion and approval by legal authorities.