A report that many apples contain a carcinogen has minimal impact on consumers. Few consumers intend to change their buying habits. However, in March, one month after the report, the grocery store's Apple sales have fallen significantly. Which of the following, if true, would best explain the apparent difference? ? ['In March, many grocers removed apples from shelves in order to show their concern for consumer health.', 'Due to a large number of food safety warnings, consumers have been indifferent to such warnings by March.', 'Although this preservative is also used on other fruits, this report did not mention it.', 'In addition to newspapers, this report also appeared on TV.']