og－41

Since the mayor’s publicity campaign for Greenville’s bus service began six months ago, morning automobile traffic into the midtown area of the city has decreased seven percent. During the same period, there has been an equivalent rise in the number of persons riding buses into the midtown area. Obviously, the mayor’s publicity campaign has convinced many people to leave their cars at home and ride the bus to work.

Which of the following, if true, casts the most serious doubt on the conclusion drawn above?

A. Fares for all bus routes in Greenville have risen an average of five percent during the past six months.

B. The mayor of Greenville rides the bus to City Hall in the city’s midtown area.

D. The number of buses entering the midtown area of Greenville during the morning hours is exactly the same now as it was one year ago. C

E. Surveys show that longtime bus riders are no more satisfied with the Greenville bus service than they were before the mayor’s publicity campaign began.
            

答案c里说，可以给通勤车用的道路少了，那怎么会坐bus的人变多了呢？这里面是怎么个逻辑呢？

谢谢拉先

这是哪本OG呢？
是不是选C啊？

疑问：道路重建，automobiles不能走，公共汽车就能走？不明白C的解释。

另外，对于D的解释也不是很明白