Laws, they are balanced with laws.
I'm afraid I couldn't give you a complete answer, or the answer that you're looking for, for this question regarding the Native-born Americans in 1860's since there is no map provided with this question. Try re-posting this question with the map on it.
The answer would be D) Life, Liberty and the pursuit of Happiness
The united states acquire native american lands with such ease in the nineteenth century as by <span>Indian Removal Act made he move of tribes voluntary (either become American or let us use your territory. Thank you for posting your here. I hope the answer helps. </span>