"<span>The Union desired to push the Native Americans off of their land to further the expansion West" would be the best option from the list, since both sides knew that their future relationship would not last in any meaningful way. </span>
The Articles of Confederation were essentially an early version of the US Constitution that were created as a governing agreement among the 13 original colonies/states to fight the Revolution and establish some limited federal power.
Hope that helps! :)
Characteristics of sourcing includes a reliable source or document, Evidence, Reasoning
The answer is B (Regional Lords).
Hope this helps :)