Conducting Fiscal Policy So That G = T $\beta$ (U - U_n), Where G Is Government Expenditures, T Is

Multiple Choice

Conducting fiscal policy so that G = T + $\beta$ (u - u_n) , where G is government expenditures, T is tax revenue, u is the unemployment rate, u_n is the natural rate of unemployment, and $\beta$ is a positive number, is an example of a(n) :

A) active rule.
B) passive rule.
C) discretionary policy.
D) automatic stabilizer.