All of the following reasons were behind white opposition to african american migrants during the first great migration except

a. fear that african americans would take jobs as strikebreakers
b. fear that african americans would get all the credit for fighting in world war i
c. racial tension over african americans moving into adjacent neighborhoods
d. anger directed at the economic success of some african americans

C

Racial tension over African Americans moving into adjacent neighborhoods so they tray to migrate to another country for more successful and power

this isnt

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.