Which of the following describes the north vietnamese and vietcong's war strategy? a. avoid defeat until the americans gave up b. attack the americans in large military confrontations c. push the americans with large scale bombing raids d. rely on china to send troops to the war effort

maybe you need to work on the pipes in the house. i am just saying this because you did not give any details.

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.