<u>Grant's peace policy led to the Battle of Little Bighorn. </u>
Grant's policy had a total disregard for the Indians' freedom, culture and way of life. President Grant's policy failed to consider the needs of Native Americans by placing them in reservations where missionaries would teach them how to be "civilized", how to farm, to wear European clothing, and to adopt Christianity as their religion. If there was any opposition by Indians, soldiers would force them off of tribal lands. As a result, the Battle of the Little Bighorn took place when tribal armies refused to stay off of their land and waged a war against the whites.
The main issue that caused concern between the federal and state governments in the 1800s was Control over slavery.
<h3>Why was this the main issue?</h3>
In the 1800s, the issue of slavery was very contentious with the federal government being controlled at different times by pro and anti slavery politicians.
They therefore came into conflict with states on the issue of slavery with this eventually culminating into civil war.
In conclusion, option C is correct.
Find out more on federal v. state issues at brainly.com/question/5496965.
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or answer c is what you are looking for