After Extensive Analysis,a Mail Order Company Has Decided to Embark

After extensive analysis,a mail order company has decided to embark on a policy of multiple-zone pricing.In which step of the price-setting process would the mail order firm have made this decision?

A) make special adjustments to the list or quoted price
B) select an approximate price level
C) estimate demand and revenue
D) identify price constraints and objectives
E) set list or quoted price