The subway system in New City has recently been running a severe budget deficit. Analysts have concluded that, to avoid a crisis, subway revenues must increase by 50% from the current level, beginning with the coming quarter. Subway riders are currently charged a flat fare per ride; the chairperson of New City's transit authority has concluded that a 50% increase in this fare, effective at the beginning of the coming quarter, will be sufficient to avert any crisis. Each of the following, if true, calls into question the chairperson's conclusion EXCEPT
(A) Subway fares are paid with single-ride tokens that are purchased in advance and do not expire.
(B) On the most heavily traveled routes in New City's downtown, express bus fares range from 25 to 40 percent greater than current subway fares.
(C) Under New City's tax code, subway fare increases of more than 25 percent trigger reductions in the amount of tax money allocated to the subway system.
(D) New City's economy is adding many more jobs in suburban areas, which are inaccessible by subway, than in the urban areas that the subway system serves.
(E) Mobile phones, upon which a significant percentage of New City's workers have come to depend for essential communication while commuting, will be banned on the subway from the coming quarter onward