1-Consider an economy in which there's one farmer who grows corn and another farmer who grows sheep, and they engage in direct exchange so that they consume both goods. Which of the following is true?...

Extracted text: 1-Consider an economy in which there's one farmer who grows corn and another farmer who grows sheep, and they engage in direct exchange so that they consume both goods. Which of the following is true? A-There is no money in this economy since it's a barter system. B-In this economy, only corn is considered money. C-In this economy, only sheep is considered money. D-In this economy, both corn and sheep are considered money.