What is the main difference between macroeconomics and microeconomics? a. macroeconomics studies the market system on a large scale, while microeconomics studies markets individually. b. macroeconomics focuses on the role of the government in the economy, while microeconomics focuses on the role of the individual. c. microeconomics studies the market system on a large scale, while macroeconomics studies markets individually. d. microeconomics focuses on the role of international trade in the economy, while macroeconomics focuses on the role of firms.