I'm Pretty Sure The Answer Is B
Federalism is a system of government in which the same territory is controlled by two levels of government. Generally, an overarching national government is responsible for broader governance of larger territorial areas, while the smaller subdivisions, states, and cities govern the issues of local concern
One of the major long term effects of the recognition of Christianity in Constantinople was that Christians were no longer persecuted, which led to Christianity becoming a major religion in Europe.
