Answer:
A, B, C,
Step-by-step explanation:
The advantage of federalism and separation of powers is that no single aspect of government has too much power. If the federal level were able to directly control state-level policy, this could lead to a number of problems. individual states have varying demographics and ideologies. The federal government cannot account for all of this in their policy, so a lot of decisions are left to the states. The same principal applies to separation of powers. The different branches handle different areas of federal responsibility and they are all exclusive.