一道GWD 想不明白啊。。

xingxc11

Q37: GWD-29-Q17
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?
A.    The percentage of Altonville’s yearly revenue that comes from money collected in property taxes did not change over the past four years.
B.    The percentage of Altonville’s yearly revenue that comes from money collected in property taxes has declined steadily over the past four years.
C.    The amount of revenue that Altonville collected from property taxes was lower last year than it was four years ago.
D.    During the past four years, Altonville officials increased tax rates on other sources of revenue such as retail sales and business profits.
E.    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 为什么啊？？求大牛解答

hanshipeng

补充一句，"assessed value decline" while tax rate keeps constant, then tax goes down. There are two values in the paragraph( assessed value, market value)

sdcar2010

C) is right. Number vs. percentage.

property tax = tax rate * property value

If tax rate is the same while the poperty value declines, the property tax has to go down as well.