The correct answer is A. Olmec
They were the group of people that lived in the central and south America before all the more famous groups like Aztecs, Maya and Inca. They created the calendar that was used by those three later and many believe that they are the creators of the concept of zero.
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Explanation:
Do u have some sort of book or passage that this question goes to I am unable to answer because this has no passage I would like to help you out
Federalism helped to solve the problems between the state and federal government by creating a system in which these two different governments shared power in a somewhat equal manner.
Under the Articles of Confederation, the state governments had significantly more power than the federal government. The lack of power by the federal government resulted in disunity in America. This is why the US Constitution included more power for the federal government. However, the state governments would still have significant power thanks to the addition of the 10th amendment. The constitution helped to create a good balance between the two types of government.