A certain brand of pest repellent has been shown by several independent gardening journals to be ineffective in keeping away many of the most harmful breeds of aphid. Nonetheless, sales of this brand of pest repellent have remained robust throughout the greater Atlanta region, which has historically had one of the highest aphid concentrations in the United States.
Which of the following can be most reasonably concluded based on the above information?
A. Atlanta gardeners do not typically read gardening journals
B. The aphid population of Atlanta has declined dramatically in recent years.
C. The manufacturers of this pest repellent have deliberately misled consumers regarding its effectiveness against aphids.
D. Aphids are not the only potentially harmful garden pests in high concentration in the Atlanta region.
E. When used in combination with a stronger pest repellent, this one is particularly effective in keeping away all kinds of aphids.