Question 21-22
If the city council institutes new parking regulations, city revenues will surely increase, since studies have conclusively shown that, if such parking regulations are put into effect, there is an increase in parking violations, and an increase in parking violations will result in a greater number of parking fines collected.
22. If the statements in the passage are true, which one of the following must also be true?
(A) Unless there is an increase in the number of parking violations in the city, city revenues will not increase.
(B) If the city council institutes new parking regulations, the council will fall from favor with the citizens.
(C) The city council will institute new parking regulations only if an increase in city revenues can be expected to result.
(D) If the city council’s new regulations cause more parking violators to be ticketed, the city revenues will increase.
C怎么不对,ONLY IF A,THEN B,就是B推出A, 我觉得C好象可以,为什么不对,答案是D
C是在什么情况下city council会制定这个规则，属于无关信息。问题讨论的是这个规则可不可行，而不是在什么情况下会实施。
次题干中存在一个gap，那就是政府的revenue会上升和更多人触犯规则之间存在一个gap，更多人触犯规则revenue就一定上升吗？那么如果这个argument正确的话，这个gap就会不存在，那么只有D才补出了这个gap。
谢谢,明白.
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