The correct answer is: B. Chicago school.
Milton Friedman was an American economist and statistician who was a leader of the Chicago school of economics. He was a recipient of the 1976 Nobel Memorial Prize in Economic Sciences.
The Chicago school of economics is a neoclassical school of thought that emphasizes the importance of free-market capitalism and the use of monetary policy to control the economy.
The Ohio school of economics is a school of thought that emphasizes the importance of government intervention in the economy.
The Cambridge school of economics is a school of thought that emphasizes the importance of Keynesian economics.
The London school of economics is a school of thought that emphasizes the importance of institutional economics.