The united states' policy of containment after world war ii was intended to prevent communism from spreading beyond
the middle east.
south america.
the soviet union.
western europe.

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.

the effect of the ming leaders banning ships with more than two masts was that there was no further construction of ships masts, because there was a surplus. ming emperors disallowed foreign exploration

your answer will be b. improving roads, bridges, and other infrastructure. hope i !

it was bribing i think i might be wrong though