Acampaign pamphlet for a presidential candidate uses photographs of other candidates. the opposing candidates' photos are cut-and-pasted into photographs of angry crowds, giving the appearance that people are upset or disapprove of the oppositing candidates. this photo exemplifies

This photo exemplify PHOTO BIAS. Photo bias is the technique of using the image or photo of a supporter of an opposition party to generate a hostile impression in his fans. This strategy is usually used to shape the way people look at someone and to influence their opinions about that person.

 What is the object of the preposition among?

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