编辑点评： GRE写作需要大家积累一定的写作素材、锻炼自己的逻辑思维、多多积累一些有用的句子和词汇，有了这些基础以后，就需要大家根据真题来进行练习写作了。
The following memorandum is from the business manager of Happy Pancake House restaurants.
Butter has now been replaced by margarine in Happy Pancake House restaurants throughout the southwestern United States. Only about 2 percent of customers have complained, indicating that 98 people out of 100 are happy with the change. Furthermore, many servers have reported that a number of customers who ask for butter do not complain when they are given margarine instead. Clearly, either these customers cannot distinguish butter from margarine or they use the term butter to refer to either butter or margarine. Thus, to avoid the expense of purchasing butter and to increase profitability, the Happy Pancake House should extend this cost-saving change to its restaurants in the southeast and northeast as well.
Write a response in which you discuss what questions would need to be answered in order to decide whether the recommendation is likely to have the predicted result. Be sure to explain how the answers to these questions would help to evaluate the recommendation.
中文翻译：
在整个美国西南部的所有Hp餐厅都采用人造黄油替代了天然黄油。只有2%的顾客投诉，这意味着100人中有98人对于这次改变都是愉悦的。另外，很多服务生报告说很多投诉要天然黄油的顾客在被给了人造黄油以后便没有了投诉。很明显，要么是这些顾客无法辨清人造或天然黄油，要么是他们用天然黄油来指代人造或天然黄油。因此，为了避免购买天然黄油的花销并且提升利润率，Hp餐厅应该将这种节约开销的方式推广到美国东南部以及东北部的所有餐厅。
写一篇回应，在其中讨论还有哪些问题需要被回答才能决定文中的推荐是否能得到预期结果，并务请解释对这些问题的回答是如何帮助更好的评估文中的建议的。
此上就是为大家提供的新版GRE写作新题库Argument部分的内容，希望大家能够在练习中提高自己的写作水平。