Official Solution:
The underground metro rail stations of the city Kolta are known to be dirty. The commuters often do not throw away the trash in designated dustbins, but simply toss them on the station platforms. The new mayor of Kolta has planned to take up an intensive cleaning campaign lasting for four consecutive weeks for all the underground metro rail stations of Kolta. However the outgoing mayor of the city does not believe that the four week intensive campaign would be effective in keeping the underground metro stations clean in the long run after the campaign ends.
Which of the following statements most seriously bring into question the belief of the outgoing mayor?
A. The above-ground platforms of the metro rail stations are also dirty and there is no cleaning campaign planned for them.
B. Regular cleaning schedule for the underground stations will be introduced by the new mayor after the four week campaign ends.
C. The majority of people of Kolta who commute by metro rail stations did not vote for the new mayor.
D. The commuters throw trash in undesignated areas only if there is already trash lying around in these undesignated areas.
E. The amount of trash accumulated on the metro station platforms is enormous, making the cleaning campaign costly.
A. The question is about underground platforms. The condition of the above-ground platforms is out of scope of the argument.
B. The argument is about whether the intensive four week campaign would be effective in keeping the stations clean in the long run. It may be true that a regular cleaning schedule after the campaign would keep the stations clean, but in that case, the reason for the stations remaining clean would be the regular post-campaign cleaning and not the four week intensive campaign itself. Thus this option does not deal with the belief of the outgoing mayor about the effectiveness of the four week intensive cleaning campaign.
C. This option has no direct bearing on the outgoing mayor’s belief. Even if one argues that the majority of the comforters are not supporters of the new mayor, they are less likely to support the campaign, thereby making the argument of the outgoing mayor strong.
D. CORRECT. This option shows a reason that the campaign would be effective in keeping the station clean in the long run. Once the stations are cleaned, it is less likely that people would throw trash on the undesignated areas of the cleaned rail stations, since they tend to throw trash ONLY if there is already trash lying around in undesignated areas.
E. This statement indicates that costs of the campaign would be high, but it does not indicate whether the campaign would be effective in keeping the stations clean in the long run (or not). Hence this option does not support or oppose the belief of the outgoing mayor.
Answer: D