Voters commonly condemn politicians for being insincere, but politicians often must disguise their true feelings when they make public statements. If they expressed their honest views—about, say, their party's policies—then achieving politically necessary compromises would be much more difficult. Clearly, the very insincerity that people decry shows that our government is functioning well.


Which of the following, if true, most seriously undermines this reasoning?


(A) Achieving political compromises is not all that is necessary for the proper functioning of a government.


(B) Some political compromises are not in the best long-term interest of the government.


(C) Voters often judge politicians by criteria other than the sincerity with which they express their views.


(D) A political party's policies could turn out to be detrimental to the functioning of a government.


(E) Some of the public statements made by politicians about their party's policies could in fact be sincere.



Let’s look at the stimulus once again- 


Premise/Data-


Voters commonly condemn politicians for being insincere

but politicians often must disguise their true feelings when they make public statements.

If they expressed their honest views, say, their party's policies—then achieving politically necessary compromises would be much more difficult.


Conclusion


Clearly, the very insincerity that people decry shows that our government is functioning well.


We need to find an option that goes against the conclusion.


(A) Achieving political compromises is not all that is necessary for the proper functioning of a government.


Politicians being insincere is good because if politicians express their honest views regarding their party’s policies, it will be difficult to achieve politically necessary compromises. Therefore the very insincerity that people decry shows that our government is functioning well.


A says that insincerity is not all that is necessary for the proper functioning of the government. 


A makes the argument flawed. It weakens the argument and is correct.


(E) Some of the public statements made by politicians about their party's policies could in fact be sincere.



How does this impact the conclusion? Let’s say that there are some politicians who are in fact sincere. So?

Does this impact the conclusion that the insincerity of the politicians shows that our government is functioning well? No. It is irrelevant. Eliminate.