Answer:
b. Levels of government with powers they can use to leverage other levels of government.
Step-by-step explanation:
Federalist constitutions are those that adopt and defend the federative pact, which states that the governance of a region must be carried out between federated entities that have a certain autonomy, but are submitted to the power of a central aspect. Translating, these constitutions divide the country into spheres, called federal, state and local. Each of these spheres has autonomy, however all are subject to a higher sphere, the federal sphere.
With that, we can say that federalist constitutions have levels of government with powers that they can use to leverage other levels of government.