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Keynesianism(Identify the historical significance)None of the choices are correct.An economic theory based on the thoughts of British economist John Maynard Keynes, holding that central banks should adjust interest rates and governments should use deficit spending and tax policies to increase purchasing power and hence prosperity.Specialists in law, economics, and welfare, many of them young university professors, who advised President Franklin D. Roosevelt and helped develop the policies of the New Deal.A flagship accomplishment of the New Deal, this law provided for unemployment and old-age insurance financed by a payroll tax on employers and employees. It has long remained a pillar of the "New Deal Order."

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