Classical economists thought that A. flexible wages and prices were the principal causes of recessions. B. price, wage, and interest rate flexibility can quickly cure any tendencies for a recession. C. government policies and spending were needed to keep the economy at full employment. D. the Great Depression confirmed their view of the business cycle.The investment function is represented as an inverse relationship between the value of planned real investment and A. the rate of saving. B. consumption. C. the rate of interest. D. real disposable income