Critical Reasoning

Newspaper publishers earn their profits primarily from advertising revenue, and potential advertisers are more likely to advertise in newspapers with a wide circulation - a large number of subscribers and other readers - than with other newspapers. However, the circulation of the newspaper that is currently the most profitable one in this city has steadily declined during the last two years, while the circulation of one of its competitors has steadily increased.

Any of the following, if true, would help explain the apparent discrepancy between the two statements above EXCEPT:

A. Advertisers generally switch from the most widely circulated newspaper to another one only when the other one becomes the most widely circulated newspaper instead.
B. The number of newspapers competing viably with the most profitable newspaper in the city has increased during the last two years.
C. The most profitable newspaper in the city receives revenue from its subscribers as well from advertisers.
D. The circulation of the most profitable newspaper in the city is still greater than of any of its competitors.
E. Advertising rates charged by the most profitable newspaper in the city are significantly higher than those charged by its competitors.

Please give me the explanation for this question, thank you!