题目：
The following appeared in a health magazine.
"The citizens of Forsythe have adopted more healthful lifestyles. Their responses to a recent survey show that in their eating habits they conform more closely to government nutritional recommendations than they did ten years ago. Furthermore， there has been a fourfold increase in sales of food products containing kiran， a substance that a scientific study has shown reduces cholesterol. This trend is also evident in reduced sales of sulia， a food that few of the most healthy citizens regularly eat."
Write a response in which you discuss what specific evidence is needed to evaluate the argument and explain how the evidence would weaken or strengthen the argument.
中文翻译：
Forsythe的居选择了更健康的生活方式。他们对于最近一项调查的回答显示，他们的饮食习惯比十年前更加贴近政府的营养建议。而且，含有kiran的食品销量增长了四倍，在一次科学研究中发现kiran是一种能够降低胆固醇水平的物质。这种趋势同样也被sulia的销量下降所证实，sulia是那些最健康的居极少经常食用的食品。
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