B. Rebuild their economies.
My source for this answer:
“ an effort to prevent the economic deterioration of postwar Europe, expansion of communism, and stagnation of world trade, the plans that out to stimulate European production, promote adoption of policies leading to stable economies, and take measures to increase trade among European countries in between Europe and the rest of the world.” (www.everycrsreport.com)
This would be the definition of an obligation.
Answer:
Marginal costs and benefits are a vital part of economics because they help to provide the relevant measurement of costs and benefits at a certain level of production and consumption. If measured marginal costs and benefits are provided, it is much easier to calculate the ideal price and quantity.
D-The second Continental Congress.
The back lawn of white house