B,the structure of the permanent income and wealth C,all kinds of assets expected return and opportunity cost D,wealth holders of preference E,all kinds of securities 3,ShortAnswer Questions (1)If cash holdings increase how to affect the money multiplier and the money supply? (2)What is the three motivation of demand of money?Explain it.B, the structure of the permanent income and wealth C, all kinds of assets expected return and opportunity cost D, wealth holders of preference E, all kinds of securities 3、Short Answer Questions （1）If cash holdings increase ,how to affect the money multiplier and the money supply? （2）What is the three motivation of demand of money? Explain it