问题如下图：
选项：
A. 
B. 
C. 
解释：
b选项为什么不对，麻烦老师解答下
NO.PZ2018062017000015 问题如下 Whiof the following mlea country’s totimports to crease? A.mestic G increases accelerating level. B.the country's main trang partners are in economic wnturn. C.comparewith the country's main trang partners, the mestic currenpreciates continuously. C is correct. Comparewith the country's main trang partners, if the mestic currenpreciates, the prices of mestic goo will cheaper, making them more attractive thforeign goo, the imports manwill cline. a result, if the currenpreciates continuously, the country’s totimports will crease.考点ResourUse Through The Business Cycle解析:如果一国G高速增长，那么该国居民的消费会随之增加，这会导致该国进口的增加而非下降，所以A说法错误。A国贸易对手国经济不景气并不会影响A国的总需求和进口情况，所以B说法错误。如果一国货币持续贬值，那么国外的商品用本币计价表示会越来越贵，这会导致本国居民减少对外国商品的购买，出口下降，所以C是正确的。 根据Y=C+I+G+(X-M)，Y增加，所以M减少呀，为什么不能用这个公式来分析呢
NO.PZ2018062017000015 问题如下 Whiof the following mlea country’s totimports to crease? A.mestic G increases accelerating level. B.the country's main trang partners are in economic wnturn. C.comparewith the country's main trang partners, the mestic currenpreciates continuously. C is correct. Comparewith the country's main trang partners, if the mestic currenpreciates, the prices of mestic goo will cheaper, making them more attractive thforeign goo, the imports manwill cline. a result, if the currenpreciates continuously, the country’s totimports will crease.考点ResourUse Through The Business Cycle解析:如果一国G高速增长，那么该国居民的消费会随之增加，这会导致该国进口的增加而非下降，所以A说法错误。A国贸易对手国经济不景气并不会影响A国的总需求和进口情况，所以B说法错误。如果一国货币持续贬值，那么国外的商品用本币计价表示会越来越贵，这会导致本国居民减少对外国商品的购买，出口下降，所以C是正确的。 请问这道题为什么不能从公式的角度去分析了呢？如果从公式分析，A也是正确的吧？
老师，B为什么不对？对方经济下行出口不就少了么？A国进口就少了
A G的上升带来什么影响？如何理解？谢谢
