The superpower status of the United States is currently threatened by which of the following rising powers?

The study of individual decision-making revolves around the question of __________

Fill in the blank with the appropriate word.

A system of progressive taxation is one in which

a. government revenue is derived primarily from income taxes instead of property or consumption taxes. b. tax rates are the same for everyone, but the rich pay more because they have greater wealth. c. government revenue is derived primarily from taxes of property or consumption taxes instead of income. d. the tax rate increases as one's income increases. e. the government taps into the broadest possible sources of revenue including income, consumption, and property.