Although Ackerburg's subway system is currently operating at a deficit, the transit authority will lower subway fares next year. The authority projects that the lower fares will result in a ten percent increase in the number of subway riders. Since the additional income from the larger ridership will more than offset the decrease due to lower fares, the transit authority actually expects the fare reduction to reduce or eliminate the subway system's operating deficit for next year. Which of the following, if true, provides the most support for the transit authority's expectation of reducing the subway system's operating deficit? ['The subway system can accommodate a ten percent increase in ridership without increasing the number of trains it runs each day.', 'Next year, the transit authority will have to undertake several large-scale track maintenance projects.', 'The current subway fares in Ackerburg are higher than subway fares in other cities in the region.', 'Throughout the years that the subway system has operated, fares have never before been reduced.']