Which of the following is least likely to be cited as a limitation of discretionary fiscal policy stabilizers（）
A. Changes in the business cycle are difficult to predict.
B. Taxes paid by households increase as incomes rise.
C. Legal changes are delayed while legislators debate fiscal policy issues.
参考答案：B
解析：
Discretionary fiscal policy stabilizers face several limitations. First, economic forecasts might be wrong, which will likely lead to wrong fiscal policy decisions. Second, complications arise in practice that delay the effects of the discretionary stabilizers. Legal changes take time to implement and to have an effect on the economy. All these choices are examples of limitations of discretionary fiscal policy. On the other hand, "induced taxes", in which taxes paid by households increase as incomes rise, are an example of an automatic fiscal policy stabilizer, not a discretionary fiscal policy stabilizer.