A report that watermelons contain swelling agents may affect their health, which has little impact on consumers, and few consumers intend to change their buying habits of watermelons. Still, in July, a month after the report, watermelon sales in a large supermarket chain fell sharply.
The statement 'After mid-July, the large supermarket chain took the initiative to stop selling watermelons in order to show its responsibility to consumers' can best explain the above phenomenon.