The U. S territory of Puerto Rico is closest to which of the following? A. Hawaiian islands. B. Samoa. C. Kingman Reef. D. U. S Virgin Islands.

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