Respuesta :
The correct answer is D.) national and state governments are exclusively sovereign in their areas. Basically, the layers of the cake are separate in what they do, but together they make a good cake. In politics terms, this is called the layer cake system or the dual federalism system. They are sovereign in their own things but they also work together.
Answer:
D.) national and state governments are exclusively sovereign in their areas.
I hope this helps.