问题如下：
When government spending increases, which curve would shift?
选项：
A. LM curve
B. IS curve
C. AS curve
解释：
B is correct.
IS curve can be described as: S=I+(G-T)+(X-M). When government spending increases, Savings go up so that the equation will hold. This will make GDP increases , so IS will shift to the right.
考点：IS曲线
解析：根据S=I+(G-T)+(X-M)，可知X-M以及政府支出G，税收T都是外生变量，它们的变动会造成IS的平移
当G增加时，Y会增加，这表现为IS曲线向右平移。
LM曲线的平移只与价格水平以及名义货币供给有关，所以A选项不入选。
xuanxiangC如何理解
