To suit the needs of corporate clients, advertising agencies have successfully modified a strategy originally developed for political campaigns. This strategy aims to provide clients with free publicity and air time by designing an advertising campaign that is controversial, thus drawing prime-time media coverage and evoking public comment by officials. The statements above, if true, most seriously undermine which one of the following assertions? ['Campaign managers have transformed political campaigns by making increasing use of strategies borrowed from corporate advertising campaigns.', 'Only a small percentage of eligible voters admit to being influenced by advertising campaigns in deciding how to vote.', 'Advertising agencies that specialize in campaigns for corporate clients are not usually chosen for political campaigns.', "The usefulness of an advertising campaign is based solely on the degree to which the campaign's advertisements persuade their audiences."]