Answer:
The answer is C. States joined the Union on a voluntary basis
The Sand creek massacre was when the U.S army attacked, killed and mutilated 70-500 native Americans, 2/3 were women and children. Hope this helps, plz mark brainliest.
It made Americans have less trust in their government
<span>Economic development and growth Hindu.
</span><span>c) the number of countries democratizing</span>
