Question

milton friedman led a new economic school of thought called
laissez faire.
monetarism.
price signaling.
the invisible hand.

Explanation:

Milton Friedman was a key proponent of monetarism, which emphasizes the role of money supply in the economy. Laissez - faire is a general economic philosophy of minimal government intervention, not led by Friedman. Price signaling is about how prices convey information, not a school of thought led by him. The "invisible hand" is associated with Adam Smith, not Friedman.

Answer:

B. monetarism.