The government recently released a study of drinking water, in which it was reported that consumers who bought bottled water were in many cases getting water that was less safe than what they could obtain much more cheaply from the public water supply. In spite of the enormous publicity that the study received, sales of bottled water have continued to rise. Which one of the following, if true, is most helpful in resolving the apparent paradox? ['The rate of increase in the sales of bottled water has slowed since the publication of the government study.', 'Most consumers who habitually drink the bottled water discussed in the study cannot differentiate between the taste of their usual brand of bottled water and that of water from public sources.', 'Government health warnings concerning food have become so frequent that consumers have begun to doubt the safety of many everyday foods.', 'Increased consumption of the five best-selling brands of bottled water, which the report said were safer than both public water and most other brands of bottled water, accounted for the increase in sales.']