If bananas were used as money, which of the following functions of money would be the hardest for bananas to satisfy?

Economic magnitudes measured at the prices actually paid are referred to as ________ magnitudes

A) "real" B) "actual" C) "nominal" D) "unadjusted" E) "gross"

Barter is

a. illegal in the United States b. an efficient system of exchange c. most useful when there is much specialization and international trade d. only possible if money is used as a medium of exchange e. the direct exchange of goods, without the use of money