Is the flexibility of the labor market the only determinant of the natural rate of unemployment? Other determinants of the natural rate of unemployment include (Check all that apply.) A. workers' knowledge and understanding of Federal Reserve policies. B. the availability of unemployment insurance and other transfer payments. C. the prolonged effects of past high rates of unemployment on the current unemployment rate. D. demographic factors, such as the age structure of the population. E. the effects of falling production during a recession