A copyright creates a monopoly by restricting ________

The principle stating that, for virtually all goods and services, there is a negative relationship between price and quantity demanded, all other things unchanged, is the law of:

A) supply. B) demand. C) scarcity. D) increasing opportunity costs.

Which of the following taxes is based on the ability-to-pay principle?

a. Road taxes paid by the buyers of gasoline b. Progressive income taxes that pay for scientific research c. Payroll taxes that pay for Social Medicare d. Education taxes paid by parents