When the distribution of income is adjusted for noncash transfers, the income distribution shows:

Which one of the following statements is most correct?

A) Any central bank purchase of assets automatically results in an increase in the domestic money supply, while any central bank sale of assets automatically causes the money supply to decline. B) Any central bank purchase of assets results in an increase in the domestic money supply, while any central bank sale of assets causes the money supply to decline. C) Any central bank purchase of assets automatically results in a decrease in the domestic money supply, while any central bank sale of assets automatically causes the money supply to decline. D) Any central bank purchase of assets automatically results in a decrease in the domestic money supply, while any central bank sale of assets automatically causes the money supply to increase. E) Any central bank purchase of assets automatically results in an increase in the domestic money supply, while any central bank sale of assets does not necessarily affect the money supply.

Economic theory

a. is a set of definitions, postulates, and principles assembled in a manner that helps make cause-and-effect relationships clear in economics. b. is like a guidebook in that it points out what to look for. c. provides economists with a common language and way of thinking about how the world works. d. is all of the above.