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.
If the statement 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 in 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.
E. Unless the city institutes a complex system of parking regulations, the city cannot expect traffic violations to increase.
答案是D, 我选的是C, 我考虑的是在C选项中, 前半句是充分条件, 后半句是必要条件, 和原文符合, 为什么不对呢?
If you choose C, you seem to assume that the city established the new regulations to increase the city's revenue. But this point is not mentioned by the stimulus.
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