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宏观 经济,这题答案是什么? 1. Which of the following would increase outp

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宏观 经济,这题答案是什么? 1. Which of the following would increase output in the short run
a an increase in stock prices makes people feel wealthier.
b government spending increases.
c firms chose to purchase more investment goods.
d All of the above are correct.

应该选什么,我觉得D.如果不是可以解释一下吗
C is correct.
In A and B, demand increases but supply stays the same in the short run.
再问: 这个output是指什么啊?
再答: supply 的量
再问: 你的意思是这个output是指supply and demand 的量吗,因为如果这个output只是指demand的量的话就是abc都对了>
再答: output是指supply的量,而不是demand 的量