单项选择题
Refer to Figure 3.2. Which of the following would be most likely to cause the demand for macaroni and cheese to shift from D1 to D0?
Refer to Figure 3.2. Which of the following would be most likely to cause the demand for macaroni and cheese to shift from D1 to D0?
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单项选择题
有关于历史不变约束下列说法正确的是： （ ）
有关于历史不变约束下列说法正确的是： （ ）
A．资金的变化不会影响之后的收益率，但是对投资历史产生影响
B．资金的变化只能影响之后的收益率，不能改变投资历史
C．资金的变化对之后的收益和之前的投资历史都有影响
D．资金的变化不会影响之后的收益率，同时不能改变投资历史