Differentiate the study of microeconomics from macroeconomics. Which of the following statements is true? a.) Both Classical and Keynesian economics focus on microeconomics. b.) Classical economics focuses more on the entire economy (macroeconomics), and Keynesian economics focuses more on markets (microeconomics). c.) Classical economics focuses more on markets (microeconomics), and Keynesian economics focuses more on the entire economy (macroeconomics). d.) Neither Classical nor Keynesian economics focuses on microeconomics