The term "civil rights" primarily refers to the rights that protect individuals' freedom from infringement by governments, social organizations, and private individuals. It encompasses the rights of citizens to participate fully in the civil and political life of society, without discrimination or repression. Therefore, while it can apply more broadly to various groups, it is most closely associated with citizens and can also pertain to minorities in the context of combating discrimination and ensuring equality.
In this context, the best fits for the term "civil rights" among your options would be citizens and minorities.