Which of the following factors contributed to the decline of the Roman Empire?

The authors of the paper "fudging the numbers: distributing chocolate influences student evaluations of an undergraduate course"† carried out a study to see if events unrelated to an undergraduate course could affect student evaluations. students enrolled in statistics courses taught by the same instructor participated in the study. all students attended the same lectures and one of six discussion sections that met once a week. at the end of the course, the researchers chose three of the discussion sections to be the "chocolate group." students in these three sections were offered chocolate prior to having them fill out course evaluations. students in the other three sections were not offered chocolate. the researchers concluded that "overall, students offered chocolate gave more positive evaluations than students not offered chocolate." indicate whether the study is an observational study or an experiment. give a brief explanation for your choice.

Xplain one benefit and one risk of making voting mandatory in the united states.

Which of the following best describes the term capitalism? it is a concept that holds, at a minimum, that all people are entitled to equal protection under the law. it is an economic system based on the private ownership of wealth-producing property. it is a set of political beliefs that include the advocacy of active government. it is an intrinsic property which measures the disregard for material possessions. it is a more popular term for the set of political beliefs known as liberalism.