Pl ! who developed a crop-rotation method that revolutionized southern agriculture?
a. george washington carver
b. henry ford
c. alexander graham bell
d. duke ellington

The folsom culture was replaced by the plano culture. clovis culture. american indian culture. paleo-indian culture.

Brainliestttme : ) what are trading blocs and what is the impact of international cooperation?

Which statement best describes standard oil in the late 1800s? standard oil controlled only a small number of the nation’s oil refineries. standard oil was a single business that operated in a small region. standard oil controlled only the means and methods of oil production. standard oil owned ninety percent of all oil refineries in the united states.