Respuesta :
The effect that federalism has on the federal government is that D. It creates distinct roles for the federal and state governments.
The U.S. practices the principle of federalism which means that there are two main levels of government which are the federal and state governments.
These two levels of government have roles assigned to them that they are to pursue and even though federal law is above state law, the federal government cannot in principle, infringe on the some rights of state governments.
In conclusion, option D is correct.
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