How did southern states react to the election of abraham lincoln in 1860
a. they felt they had no voice in national government
b. they were unhappy, but accepted the new president as their leader
c. they seceded and elected breckinridge as president
d. they called for a nation wide recount of votes

crop rotation kepy different plants in the soil instead of once constintly. when switching out plants you have different nutrients being absorbed at different speeds and different roots growing differently therfore the spoil and water flow have to adapt and carry fresh nutrients to carry the constant changes that were going on in the soil.

b) race riots in several cities