LSAT逻辑题分析：一堆废话绕晕你

-1-1-17The peculiar evil of silencing the expression of an opinion is that it robs the human race. It takes from posterity, as well as the existing generation, and from those who dissent from the opinion even more than from those who hold it. If the opinion is right, they are deprived of the opportunity of exchanging error for truth; if it is wrong, they lose what is almost as great a benefit: the clearer perception and livelier impression of truth, produced by its collision with error.

Which one of the following best expresses the conclusion presented in the argument?
A. Silencing the expression of an opinion is robbing the human race.
B. Silencing the expression of an opinion harms those who dissent more than those who agree.
C. Anyone who agrees with an opinion would not want to silence its expression.
D. Gaining a clearer perception and livelier impression of truth is a great benefit.
E. The greatest benefit is the opportunity of exchanging truth for error.

The answer is A.

take from减去; 减损; 降低

A实际上就是题干第一句话，为什么是conclusion呢？这个题目的解题思路是什么呢？
原文开头第一句话，就是结论，原文其他的话是围绕这一结论展开的。A是这句话的rephrase. 这种类型的题目，就是通过一堆废话来把examinee来绕晕，忘了原来的结论是什么了。D错的原因: D存在的前提是IF IT IS WRONG,但D中没说.IF IT IS RIGHT,D选项便错了