Thomas Jefferson's idea of how slavery could be tolerated in a nation that trumpeted liberty had to do with the fact that he felt it was a "necessary evil" that must continue long enough for the US to develop properly. He felt as though blacks were inherently inferior and therefore needed "guidance".
Im not sure but C makes more sense in that diagram
A. south Australia that where the most cattle ranching is found it
We don't have to use dirty stream water, and physically use our hands. If we didn't have washing mashines, our rivers, lakes, and oceans would be even more polluted, with all the soaps and detergents.