According to economists who support passive policymaking O A. there is no difference between the effect of an anticipated change in aggregate demand and the effect of an unanticipated change in aggregate demand of an identical amount. O B. workers always consider a change in nominal wages to be a change in real wages. O C. policies that attempt to exploit the Phillips curve trade - off will eventually become ineffective for reducing unemployment O D. expansionary policies can reduce unemployment without increasing the price level