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

- a.) african slaves and indentured servant’s

< 3

the answer to your question is:

strong-mayor system

the results of roman expansion produced social conflict and civil war. julius caesar gained power and became a dictator but was then assassinated. the reign of augustus began a long period of imperial rule and peace in the roman empire. rome faced the problems of how to maintain peace, law, and order.

hope this !

brainliest?