Which Statement About the Borderlands Between Arizona and Mexico Is

Which statement about the borderlands between Arizona and Mexico is true?

A) Native Americans have kept cattle in this region for at least a thousand years.
B) The end of the "Apache wars," the completion of railroads,and other events led to a cattle boom in this region during the latter part of the nineteenth century.
C) The cattle boom ended due to declining demand for beef.
D) The area has always been shrubland during the time humans have inhabited it.
E) Methods used to manage grasslands in Europe also worked here.