Given the following statements about major schools of thought in macroeconomics, state which are correct.
(A) The Keynesians believed in wage and price flexibility and highlighted the role of aggregate supply.
(B) The monetarists highlighted the importance of money and of expectations in the analysis of inflation.
(C) The classical school believed in the invisible hand and the efficiency of the market mechanism.
(D) The new Keynesians make use of the assumption of imperfect markets.
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