问题如下：
A country improves its trade deficit by depreciating its currency. Which of the following statements is correct in terms of elasticity approach?
选项：
A. It would benefit a producer who exporting luxury goods.
B. It would benefit a producer who exporting products with few substitutions.
C. It would benefit a producer whose export demand is inelastic.
解释：
A is correct.
Currency depreciation will have greater improvement for those export demand is elastic. The demand for products, such as luxury goods are usually elastic.
考点：elasticity approach
解析：
在弹性法下，如果进出口商品具有较大的弹性，那么货币贬值情况会得到较大改善。奢侈品通常是最有弹性的。A选项是正确的，C选项不正确。
如果一个商品的替代品比较小，那么它的弹性也较小，所以B选项不正确。
请问B选项中“几乎没有替代品”，不是指可替代性小，刚需大吗？
