One drawback of voluntary trade is that it
requires two groups to use a common language
can make one group dependent upon another for necessary goods
doesn't occur unless there is a shortage of goods for at least one group
forces groups to rely on themselves to produce all the goods they need

The correct answer is B) it can make one group dependent upon another for necessary goods.

One drawback of voluntary trade is that it can make one group dependent upon another for necessary goods.

Voluntary trade is the foundation of the actual capitalism economic system. Voluntary trade is the freedom that people have sell and buy products and services in a free market. There is also another meaning for voluntary trade in labor, that means that people are free to choose to work in any area they like or feel knowledgeable to do so for compensation or a salary. One drawback of voluntary trade is that it can make one group dependent upon another for necessary goods.  

shang dynasty

western zhou (ca. 1046-771 bce)

eastern zhou (ca. 771-256 bce)