[求助]陈向东逻辑 反对题84

amo

84 Fares on the city-run public buses in ffice:smarttags" />Greenville are subsidized by city tax revenues, but among the beneficiaries of the low fares are many people who commute from outside the city to jobs in Greenville. Some city councilors argue that city taxes should be used primarily to benefit the people who pay them, and therefore that bus fares should be raised enough to cover the cost of the service.

Each of the following, if true, would weaken the argument advanced by the city councilors EXCEPT:

(A) Many businesses whose presence in the city is beneficial to the city’s taxpayers would relocate outside the city if public-transit fare were more expensive.

(B) By providing commuters with economic incentives to drive to work, higher transit fares would worsen air pollution in Greenville and increase the cost of maintaining the city’s streets.

(C) Increasing transit fares would disadvantage those residents of the city whose low incomes make them exempt from city taxes, and all city councilors agree that these residents should be able to take advantage of city-run services.

(D) Voters in the city, many of whom benefit from the low transit fares, are strongly opposed to increasing local taxes.

(E) People who work in Greenville and earn wages above the nationally mandated minimum all pay the city wage tax of 5 percent.

D为什么是答案？如何进行逻辑分析？

陈向东在解释E选项时说：E削弱了市议员所依赖的前提，但我看不出来这种削弱关系啊！

请各位大虾指教！！

weiyu

The logic layout of the argument:

AB->C

A: people who commute from outside the city to jobs in Greenville do not pay

B: city taxes should be used primarily to benefit the people who pay them

C: bus fares should be raised enough to cover the cost of the service.

a,b,c exerts other consequence if the fare rise.     e: means that anyone who should be taxed submit the tax, that is they pay the city taxes(~B)