United States advertising agencies are increasingly using interviews at shopping malls, called "mall intercepts", to test for advertising effectiveness, product concept viability, and consumer buying habits. Critics of mall intercepts maintain that the shopping habits of mall shoppers are not representative of those of the larger population. Which of the following, if true, would provide evidence that most supports the critics' claim about mall intercepts? ['Some mall shoppers patronize more than one store in any given shopping trip.', 'Mall shoppers, on average, spend 50 percent more time shopping than shoppers at other locations do.', 'Indoor malls often attract the customary numbers of shoppers even during inclement weather when outdoor malls are likely to lose business.', 'In the course of any year, 95 percent of all households in the United States have at least one member who does some shopping at a mall.']