问题如下：
The least likely cause of a decrease in aggregate demand is:
选项：
A.higher taxes.
B.a weak domestic currency.
C.a fall in capacity utilization.
解释：
B is correct.
A weak domestic currency will result in an increase in aggregate demand at each price level—a rightward shift in the AD curve. A weaker currency will cause a country’s exports to be cheaper in global markets. Conversely, imports will be more expensive for domestic buyers. Hence, the net exports component of aggregate demand will increase.
考点：总需求
解析：C选项会引起投资的减少从而引起总需求的减少，所以不入选。
本币的贬值会导致进口的减少以及出口的增加，这又会带来净出口的增加，从而导致总需求的增加，所以B选项入选。
税收的增加，会同时减少投资以及消费，从而导致总需求减少，所以A选项不入选。
老师，为什么产能利用率降低会使得总需求减少ne ？
