Two characters of the declaration of independence includes

The first part cited the following arguments in favour of changing the form of government: All people are created equal and that they have the right to life, liberty and the pursuit of happiness; To ensure these rights, people create Governments with the consent of those who govern them; The right of people to abolish decisions of state. Structures and displacement, the abolition of the structures themselves.  

The second part of the declaration said: The King of England is a usurper, criticizing the organization of power from the standpoint of the doctrine of separation of powers: The King has placed judges in exceptional dependence on his will, the King seeks to make military power Independent from the civil and put the first above the second, the main conclusion was that the King is not able to govern the free people.

the answer to your question is a. the salt plains

in 1811, he led an expedition, known as the george c. sibley expedition, to improve relations with the pawnee and kansa tribes, and also to locate the rumored jefferson's salt mountain