U.S. trade policy has been to encourage other countries to maintain a(n) ____________________

In 2007, President Bush signed a law requiring cars to average ______ miles per gallon by 2020.

a. 25 b. 30 c. 35 d. 40

The ______ orientation/approach to policy making often involves peer-reviewed research using controlled studies.

A. scientific B. methodological C. political D. professional