Advertisement: In a recent survey, a sample representative of all new Popelka Auto Insurance policyholders reported savings of $250 a year, on average, as a result of switching their auto insurance coverage to Popelka. Thus, most people who hold auto insurance policies with other companies could save hundreds of dollars by switching to Popelka. The argument in the advertisement is most vulnerable to criticism on which one of the following grounds? ['It takes for granted that the new Popelka Auto Insurance policyholders pay no less for their auto insurance, on average, than do people who have held Popelka Auto Insurance policies for a longer period of time.', 'It fails to address adequately the possibility that people capable of saving hundreds of dollars by switching their auto insurance coverage to Popelka are disproportionately represented among the new Popelka auto insurance policyholders.', 'It fails to address adequately the possibility that switching to another insurance company would enable many auto insurance policyholders to save even more money than they would save by switching to Popelka.', 'It takes for granted that few if any of the Popelka Auto Insurance policyholders surveyed underestimated how much they saved when they switched their auto insurance coverage to Popelka.']