Passage Summary: Advertisers spend millions to change what we want, and politicians use those same tricks. Because of this, the editorialist thinks elections don't show what people actually want.

Conclusion: Election results in democratic nations do not truly reflect the pure, uninfluenced preferences of the citizenry.

Reasoning: Advertisers use expensive techniques to manipulate consumer desires, and these same manipulative tactics are employed by political strategists to influence public opinion during campaigns.

Analysis: The editorialist assumes that because these manipulative techniques are used, they are actually successful in changing voters' minds. To strengthen this argument, look for an answer choice that confirms these advertising tactics are effective at altering public opinion or that 'manipulated' preferences are fundamentally different from 'unadulterated' ones. It’s a classic case of assuming that an attempt at influence equals a successful outcome.