Using the best historical evidence at your disposal, speculate on the reasons the section on the slave trade being eliminated and what it says about the nature of political compromise and self-interest.

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