Frederick Jackson Turner’s Frontier Thesis focused on
(A) European ideals in North America
(B) the frontier and American democracy
(C) the issue of slavery and westward expansion
(D) the expansion of industrialism and the worker
(E) cultural diversity among western settlers
Frederick Jackson Turner’s Frontier Thesis focused on "(B) the frontier and American democracy," since his main argument was that westward expansion in the US played a crucial role in the development of democratic values in the US as a whole.
