Force cannot cause an object to move true or false

Who was the first present of the united states

Why would the free rider problem prevent a private business from investing in the building of a city sidewalk?

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