What is both a necessary and sufficient condition for anything to become money?

In a fixed exchange rate system, an increase in the exchange rate at which a currency is pegged is called a(n)

A) devaluation. B) revaluation. C) depreciation. D) appreciation.

The number of brands of identical products will most likely increase as

A) the number of informed consumers increases. B) the cost of producing many brands decreases. C) the number of uninformed consumers decreases. D) None of the above.