13. Which of the following best describes the relationship between self-interest and virtue in markets?

A. Markets can work well when self-interest prevails, but Adam Smith and other economists do not want society to neglect virtue.

B. Self interest generates market weaknesses, while virtue solves them.

C. Self-interest promotes economic gain temporarily, but virtue promotes economic gain perpetually.

D. Self-interest promotes economic gain, while virtue inhibits economic gain.