In the classical word, historians often described past events as caused by fate, god’s, or other supernatural factors. today, historians study the same events as classical historians, but rely on historical evidence to support their conclusions. which of the following conclusions does this support?

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