__________ is where power is balanced between the nation's capital and autonomous subdivisions

Which of the following is a factor that likely explains the choice of the United States to be isolationist or internationalist in its foreign policy in the 20th century?

A) Regional economic considerations B) International hegemony considerations C) American security concerns D) International law and organizations

In John's study, he knows that each participant had an equal probability of being placed into each of his conditions. John must have used

a. external validity. b. random assignment. c. systematic sampling. d. random sampling.