As the interest rate decreases, the quantity of money people will hold:

A barter system of payment is

A) different from a money system of payment because money does not require a double coincidence of wants. B) similar to a money system of payment because both require a double coincidence of wants. C) different from a money system of payment because the barter system is a better unit of account. D) similar to a money system of payment because both use one asset as a unit of account. E) similar to a money system of payment because both are used as stores of value and units of account.

The absence of barriers to entry in monopolistic competition means that in the long run, firms

A) earn an economic profit. B) earn zero economic profit. C) incur an economic loss. D) earn either an economic profit or zero economic profit. E) earn either zero economic profit or suffer an economic profit.