3. Within 20 years it will probably be possible to identify the genetic susceptibility an individual may have toward any particular disease. Eventually, effective strategies will be discovered to counteract each such susceptibility. Once these effective strategies are found, therefore, the people who follow them will never get sick.
The argument above is based on which of the following assumptions?
(A) For every disease there is only one strategy that can prevent its occurrence.
(B) In the future, genetics will be the only medical specialty of any importance.
(C) All human sicknesses are in part the result of individuals’ genetic susceptibilities.
(D) All humans are genetically susceptible to some diseases.（C）
(E) People will follow medical advice when they are convinced that it is effective
这题CD选项帮忙分析下吧，文章的思路不是很清楚，谢谢了
这题应该选C，虽然C中in part 不够强。
首先A和B容易排除，看题干，第一句陈述了一个事实，然后后两句给出论证，其结构如下：
已知effective strategies discovered 可推出each susceptibility counteracted
得出effective strategies discovered 则the people who follow them never get sick
中间缺少each susceptibility counteracted 指向never get sick的连接桥梁
这样分析后，基本上D属于无关干扰项，而E呢？
结论中the people 明明用了 who follow them 作限制性定语，因此不需要此assumption（想想，难道我说所有失恋的人都伤心这样一个结论，还需要所有的人都失恋吗？）
C为什么正确：首先看C项里面有in Part，说明它即使作为assumption也是比较弱的assumption，
对于这种比较弱的assumption，我建议用not＋weaken法，将C项否定取非（some human sicknesses are not at all the result of individuals’ genetic susceptibilities），看是否为削弱，很明显是对桥梁完整性的否定，为削弱。
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