Identify the author or document of the following primary source quote: "All men were made by the same Great Spirit Chief. They are all brothers. The earth is the mother of all people, and all people should have equal rights upon it."

a) Frederick Jackson Turner, 1893
b) William Gilpin, 1849
c) George Custer, 1876
d) Richard Pratt, 1892
e) Chief Joseph, 1879