Who nominates judges to the U.S. district courts?

Which of the following branches of political science is characterized by its primary focus being politics between countries?

A. American politics B. political theory C. international relations D. polity E. coalition politics

In a random sample

a. all age groups are taken into account. b. all ethnic groups are taken into account. c. every member of the population has an equal chance of appearing in the sample. d. all religious groups are taken into account. e. all political groups are taken into account.