Please help QUICK! I'll mark brainliest if correct

In which research method does a researcher change the value of one variable to determine how the change affects another variable? a. experiment b. observational research c. survey d. case study

What is the role of institutions in society - do they perform positive functions, or simply work in the interests of the powerful and against the powerless? (a related question here is why do our life chances vary by class, gender and ethnicity)

Which principle do modern democracies share with ancient athens? a. all people deserve equal rights. b. there should be no taxation without representation. c. people should vote on all matters that concern them. d. people should have a voice in government.