求教：LSAT-17-4-24

24. Although all contemporary advertising tries to persuade, only a small portion of contemporary advertising can be considered morally reprehensible. It nevertheless follows that some attempts at persuasion can be regarded as morally reprehensible.

Which one of the following, in its logical features, most closely parallels the reasoning used in passage?

(B) Not all operational tracking studies are conducted to illustrate exact corporate returns on investment. Hence, some of these studies are not reliable.

(C) A good manager always makes important decisions on the basis of adequate data, although of course some managers fail to do this. It follows that some managers are not good managers.

(D) There is a direct correlation between the number of times you repeat something and the degree to which you retain it. Therefore, repetition is always a critical factor in remembering.

(E) Some short poems are thematically pluralistic, since some sonnets are characterized by such pluralism, and all sonnets are short poems.

不明白。

原文推理：ALL。。。， some。。。 Therefore，SOME。。。选项只有CE有此结构，但C为无效推理，而原文为有效推理，故C错。剩E为答案。

原文另一个解法是画圈圈。tries to persuade是最大圈，contemporary advertising 是中圈，morally reprehensible是最小圈。E也是这个结构