Answer:
The correct answer is letter A. They made their central banks politically independent.
Step-by-step explanation:
Central banks have become independent in developed countries due to their macroeconomic stability. Thus, to maintain it, the independence of the Central Bank was adopted, and this measure would have greater control of the issuance of money by the government to finance its spending. In this sense, the independence of the Central Bank removes the influence of parliament from monetary policy decisions, and also removes the influence on managers, with parliament only overseeing, making management more technical.