问题如下图：
选项：
A. 
B. 
C. 
解释：
老师，a选项什么意思，什么叫devaluation size？答案解释第一句什么意思呀？麻烦老师详细解释下这道题
NO.PZ2016010801000117 问题如下 In orr to rethe tra ficit, the country cis to value its currency. Accorng to the elasticity approach, whiof the following hleast effects on tra ficit rection? A.capitflows. B.the prielasticity of manfor importegoo C.the prielasticity of manfor exportegoo. A is correct.The elasticity approaignores the capitflows.考点 elasticity approach解析 在弹性法下，要求进口商品以及出口商品都要具有较大的弹性。所以BC不入选。但是弹性法不会考虑资本流的情况。所以A入选。 a为什么是影响最小的
NO.PZ2016010801000117 问题如下 In orr to rethe tra ficit, the country cis to value its currency. Accorng to the elasticity approach, whiof the following hleast effects on tra ficit rection? A.capitflows. B.the prielasticity of manfor importegoo C.the prielasticity of manfor exportegoo. A is correct.The elasticity approaignores the capitflows.考点 elasticity approach解析 在弹性法下，要求进口商品以及出口商品都要具有较大的弹性。所以BC不入选。但是弹性法不会考虑资本流的情况。所以A入选。
NO.PZ2016010801000117 答案不是a么，怎么又c入选了？
请问tra ficit指的是import export 吗 也就是 net export 0？
