What was the goal of the league of nations?

Business and industries in the 1920's most closely followed the buying demands of a) the government b)farmers c)consumers d)manufactures

One drawback of voluntary trade is that it a.requires two groups to use a common language b.can make one group dependent upon another for necessary goods c.doesn't occur unless there is a shortage of goods for at least one group d.forces groups to rely on themselves to produce all the goods they need

Which power is specifically resevered for the states rather than the federal government