An Example of Friedman's K-Percent Rule Is

An example of Friedman's k-percent rule is

A) "every time GDP decreases,decrease the growth rate of the quantity of money."
B) "use all information available to determine the growth rate of the quantity of money each time GDP changes."
C) "every time GDP decreases,increase the growth rate of the quantity of money."
D) "do not change the growth rate of the quantity of money."
E) "set the growth rate of the quantity of money equal to the unemployment rate."