The reason why the creators of the US Constitution adopted federalism was C. to establish checks and balances within the legislative branch
This refers to the system of government that has to do with the mix of both federal and regional governments, which is states and federal.
Hence, we can see that the American founding fathers did not want a repeat of the tyranny of the British king, hence they did not want one man to have supreme power, hence, federalism was adopted for checks and balances purposes.
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