The states' rights questions that led to the American Civil War were primarily __________ in nature

Which method is used to choose a representative sample for a public opinion poll?

a. Haphazard sampling b. Computer simulation c. Double-blind studies d. Random sampling e. Focus groups

Which of the following is a characteristic of states in the periphery zone of the world systems theory?

a. a high standard of living b. a large government c. a lack of influence in world politics d. a thriving economy