求助GWD-29-17

The total market value of real estate in Altonville has steadily declined over the past four years.  This decline has meant that the overall figure on which the city’s property tax is based—the assessed value of that real estate—has also declined.  The percentage of assessed value that was paid as property taxes to the city, however, did not change from year to year during this period.

The information above most strongly supports which of the following?

1. The percentage of Altonville’s yearly revenue that comes from money collected in property taxes did not change over the past four years.
2. The percentage of Altonville’s yearly revenue that comes from money collected in property taxes has declined steadily over the past four years.
3. The amount of revenue that Altonville collected from property taxes was lower last year than it was four years ago.
4. During the past four years, Altonville officials increased tax rates on other sources of revenue such as retail sales and business profits.
5. Altonville will soon require property owners to pay a higher percentage of the assessed value of their property as property tax.

答案是C

整个没怎么明白~~麻烦大家帮解答下

比例问题

总的市场价值下降，那么意味着：property tax 必须依据一个数字去交，这个数字就是assessed value of that real estate，它也在下降

但是虽然assessed value of that real estate下降，但是根据他交的比例却不变

问能得出什么结论

基数减小，比例不变，结果只能是减少。所以是C