Answer:
* State rights are vital to checking the federal government's power, testing new ideas, and ensuring that citizens can better have their voices represented in government.
* It was a way to maintain individual liberty was to instill safeguards against centralized power.
I dont know a third one
Explanation:
There was no other reason, that was literally the only reason
He is the "Khagan of the Mongol Empire".
I would say your best answer would be letter C.