【求助】一道题 百思不得其解求帮助~~

ma111yue

                                                               一道题 百思不得其解求帮助~~                                                                
                   14.Many people suffer an allergic reaction tocertain sulfites, including those that are commonly added to wine as preservatives.
However, since there are several wine makers who add sulfites to none of the wines they produce, people who would like to drink wine but are allergic to sulfites can drink wines produced by these wine makers without risking an allergic reaction to sulfites.
Which of the following is an assumption on which the argument depends?
A.These wine makers have been able to duplicate the preservative effect produced by adding sulfites by means that do not involve adding any potentially allergenic substances to their wine.
B.Not all forms of sulfite are equally likely to produce the allergic reactions.
C.Wine is the only beverage to which sulfites are commonly added.
D.Apart from sulfites, there are no substances commonly present in wine that give rise to an allergic reaction.
E.Sulfites are not naturally present in the wines produced by these wine makers in amounts large enough to produce an allergic reaction in someone who drinks these wines.
这道题的问法 不应该是 那个选项是基于上文的假设？这个不是应该找加强的么？为什么答案要选E 削弱的 这个是我的审题出了什么问题么？

ma111yue

自己顶一下防沉！

sdcar2010

Necessary assumption. Use negation. The question is looking for an assumption, not an inference based on the argument.

If you negate E, then sulfites ARE naturally present in the wines in large enough amount to cause allergic reaction.  If this is true, those wine without added preservatives are also problematic. Then the argument that allergic people can avoid sulfites by choosing wines without preservatives will not hold.

We do not care anything other than sulfite when looking for an assumption.