The answer is a because it’s the anarquisla
The United States was founded on equal rights, however even though it was founded on equal rights doesn't mean that the society accepted this. There are many people in today's society that don't accept the others who are trying to express themselves. Even in a hundred years, the society won't accept equality because of what their parents have thought them.
Congress passed the treaty in order to relocate the Indian tribes living east of the Mississippi River to lands in the west.