The lowest level in the classification system is the​

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 does the point on the graph represent? a. aggregate supply and demand equilibrium b. aggregate supply c. aggregate rising prices and supply d. aggregate rise in gdp

In what way was family life impacted by industrialization? a. there was a rise in the middle class. b. there was a decrease in the birth rate. c. women were not allowed to work in factories. d. families relied on farming for food supplies.