39. 請問當價格水準 P 維持在2 時,商品市場與貨幣市場均衡的利率及所得水準為何?(A)i = 3,Y=3500(B)i = 3.5,Y=3250(C)i = 4,Y = 3000(D)i = 4.5,Y = 2750(E)i=5,Y=2500