A researcher conducted an experiment to investigate the effects of noise on the performance of employees in a manufacturing plant. In this study, the independent variable is

The two oldest theories of international politics are

a. socialism and Marxism. b. structuralism and constructivism. c. autocracy and democracy. d. realism and liberalism.

A government unit created to perform particular functions, such as fire protection and water purification and distribution is known as a(n)

A) municipal government. B) state's taxing authority. C) county government. D) special district. E) intergovernmental agency.