咨询一个解题方法

xxu7

Though sucking zinc lozenges has been promoted as a treatment for the common cold, research has revealed no consistent effect.  Recently, however, a zinc gel applied nasally has been shown to greatly reduce the duration of colds.  Since the gel contains zinc in the same form and concentration as the lozenges, the greater effectiveness of the gel must be due to the fact that cold viruses tend to concentrate in the nose, not the mouth.
In order to evaluate the argument, it would be most helpful to determine which of the following?
A.    Whether zinc is effective only against colds, or also has an effect on other virally caused diseases
B.    Whether there are remedies that do not contain zinc but that, when taken orally, can reduce the duration of colds
C.    Whether people who frequently catch colds have a zinc deficiency
D.    Whether either the zinc gel or the lozenges contain ingredients that have an impact on the activity of the zinc
E.    Whether the zinc gel has an effect on the severity of cold symptoms, as well as on their duration
看一个NN说答案是D，因为D选项的2个回答YES OR NO，分别能削弱和加强结论。我已搞明白这个题。
我的问题是，能不能将此方法扩大到凡是此类型的问题In order to evaluate the argument, it would be most helpful to determine which of the following?
选项是5个Whether 的问句 都可以用YES OR NO 的回答能否分别削弱和加强 来做题呢？
就像assumption题里，看见选项有not，去掉not能削弱结论就是答案一样是个定律呢？
请NN指点？？？跪求啊

Boilerup

对肯定是这样的，所谓知道哪一个whether可以better evaluate the argument就是那个whether肯定是要和这个argument的核心点一样的，所以这个whether的YES OR NO一定要影响到这个Arugument（加强或削弱）。

这个做题方法是对的。

xxu7

谢谢啊，还有没有类似的这种方法应用于CR呢