The correct answer is B. The constitutional principle that describes the division of powers between the federal and state government is federalism.
Federalism is a political doctrine that seeks a political entity is formed by organisms (states, provinces, regions, departments, etc.) that are associated delegating some freedoms or own powers to another higher body, to whom the sovereignty belongs (Federal State or Federation) while they maintain a certain autonomy, since some competences belong exclusively to them. In other words, it is a political system in which the functions of the government are divided among a group of associated states, first, which then delegate powers to a central federal state.
