Answer:
The correct answer is D. Layers of government are a characteristic of the federal governments.
Step-by-step explanation:
Federalism is a form of state in which sovereignty is shared between two layers of government, the central, national or federal level and the states.
A relatively large degree of independence is often assigned to the individual parts (states). In federations that were once founded by independent states at the time - this applies, for example, to Switzerland and the United States of America - the national or federal level only exists by virtue of those states. In so-called 'federations' that originated from a central power - for example the Russian Federation - this applies less or not at all.