Which of the following best expresses the esse...

Câu hỏi: Which of the following best expresses the essential information in the hightlighted sentence in the passage? Even today the barter system tends to come back into style in places suffering from social breakdown, or as an informal sideline activity in more harmonious lands.

A People still use barter because of poor social conditions or as an extra, unofficial activity

B The barter system sometimes reappears as a sideline activity in places experiencing social disturbances

C The barter system is used only informally in harmonious places, but as the main form of economic activity in troubled lands

D Bartering has always been common in both times of trouble and times of peace.