Over the last three decades in the United States, services have become a smaller fraction of GDP relative to goods

Someone who sells commodity futures is

A) hedging. B) purchasing risk. C) selling risk. D) simultaneously purchasing and selling risk. E) not necessarily doing any of the above.

Tariff rates on products imported into the U.S

A) have dropped substantially over the past 50 years. B) were prohibited by the Constitution. C) reached an all time high in 2002. D) have risen steadily since 1920. E) were the government's main source of income in 2006.