问题如下：
Which of the following is unlikely to be the result of a shift in aggregate demand?
选项：
A.stagflation.
B.inflationary gap.
C.recessionary gap.
解释：
A is correct.
A recessionary gap is caused by a decline in aggregate demand, an inflationary gap is caused by an increase in aggregate demand, stagflation is caused by a decrease in aggregate supply.
考点： stagflation.
stagflation. 是由于总供给短缺造成的，和总需求没有关系，所以A入选。
inflationary gap 是由于总需求过剩造成的，所以B不入选。
recessionary gap. 是由于总需求短缺造成的，所以C不入选。
老师 B C两项在图形上是怎么体现的
