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

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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 runa an increase in stock prices makes people feel wealthier.b government spending increases.c firms chose to purchase more investment goods.d All
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

宏观 经济,这题答案是什么? 1. Which of the following would increase output in the short runa an increase in stock prices makes people feel wealthier.b government spending increases.c firms chose to purchase more investment goods.d All
C is correct.
In A and B, demand increases but supply stays the same in the short run.