Answer:
B. The national and state governments share power.
Step-by-step explanation:
Federalism is a political doctrine that seeks for a political entity or organization to be formed by organizations (states, associations, groups, unions, etc.) that associate by delegating some liberties or powers of their own to another higher body, to whom sovereignty belongs (State federated or federation) and that retain a certain autonomy, since some competencies belong exclusively to them. In other words, it is a political system in which the functions of the government are distributed among a group of associated states, first, which then delegate powers to a central federal state. A federal system is decentralized, that is to say, that there is both a central government and lower-than-central government units, each making decisions regarding the provision of certain public services in their respective geographic jurisdictions.