Firms in which type of market structure have the least incentive to advertise?

According to general trends in the incidence of unemployment across different demographic groups in the United States, which of the following groups have the lowest unemployment rates in the country?

a. Asians b. Hispanics c. Whites d. Nonwhites e. Latinos

As a standard of deferred payment, money can be used to:

a. express debt obligations in the form of purchasing power. b. foster barter activity. c. facilitate exchanges of goods and services. d. achieve a common denominator for measuring the value of goods and services. e. ascertain the liquidity of financial assets.