When early settlers needed to buy farming equipment and supplies, they often would use the milk, eggs, and crops their farms produced as currency. As it pertains to money, this scenario depicts

A) using materials that have their own value to society as money.

B) using unlimited-supply commodities as money.

C) using "IOUs" as money.

D) bartering unlimited goods for limited goods.

E) bartering unlimited goods for other unlimited goods.