Which issue bitterly divided members of Congress and the people they represented, during the 1800s? A. how to expand the size of the United States
B. whether to make new treaties with Native Americans
C. how to distribute western land to settlers
D. whether to continue to allow slavery

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