Refer to the article “From Barter to Bitcoin” in your Money, Money, Money magazine for a complete version of this text. Based on the information in “From Barter to Bitcoin,” one can conclude that when it became inefficient to fulfill their needs and wants through trade, people began using currency.

Which detail from the text best supports this conclusion?

A. “As cities blossomed and farming progressed, the barter economy no longer worked so well.”

B. “People started growing crops and raising animals such as goats and pigs.”

C. “The original currency was probably a measure of grain, such as a bushel of wheat or barley.”

D. “The toolmaker can then use that money to buy new boots directly from the shoemaker.”