问题如下：
Which of the following best represents a contractionary fiscal policy?
选项：
A. Public spending on a high-speed railway.
B. A temporary suspension of payroll taxes.
C. A freeze in discretionary government spending.
解释：
C is correct.
A freeze in discretionary government spending is an example of a contractionary fiscal policy.
考点：contractionary fiscal policy
解析：减税以及增加修路支出是扩张财政政策的表现，所以AB选项不入选。
减少政府支出是紧缩财政政策的表现，所以C选项入选。
请问下政府支出变多会导致财政赤字从而提高市场利率，不是会减少私人投资吗？为什么增加支出是扩张性的财政政策呢？
