Which country was the only Eastern European country to experience serious violence, including the executions of the former ruling family, during the 1989 transition from communism?

A confounding factor that can occur when observation procedures change during the study is called

A) regression. B) maturation. C) selection. D) instrumentation.

Which of the following is the most damaging criticism of Super PACs?

a. It is questionable whether they are truly independent of candidates. b. They have little influence on elections, compared to other types of PACs and interest groups. c. They are overwhelmingly biased in favor of Democrats. d. They have little knowledge of the electoral process.