What important impact did Clara Barton have on American Society? O A. She was a soldier who fought alongside her husband in the
Confederate Army
B. She was a Civil War nurse who later started the Red Cross,
O C. She was a Confederate spy who lived in Washington, D. C.
O D. She was a journalist who wrote about Civil War battles for a
Northern newspaper,

B, becaus Clara Barton was a nurse in the civil war

they spoke with the president

explanation:

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.