SAT US History Practice Question

The "Turner Thesis," put forward by historian Frederick Jackson Turner in the 1890s, held that

1. A.Darwin's ideas about the natural world could be applied to human communities.
2. B.America, if it hoped to compete with European powers, must build up its navy and acquire overseas colonies.
3. C.it was the "manifest destiny" of the United States to expand from the Atlantic to the Pacific Ocean.
4. D.the frontier experience had produced a practical, self-reliant people who valued individualism and freedom.
5. E.slavery had developed an excessively negative reputation and that African Americans had been better off under slavery than living in the Jim Crow South.