各位好 请问 这题能够解释下吗 始终 都想不明白 ]
Prep2012-Pack1-CR-057 VCR000738 Hard When a cityexperiences a sharp declinein population,the city's tax revenues, which pay for suchcity servicesas police protectionandmaintenance of water lines, also decrease. The areato bepoliced and thenumber and lengthofthe water lines to be maintained, however, donotdecrease. Attemptingto make up thetaxrevenue lost by raising tax ratesis not feasible,since higher tax rates would causeeven more residents to leave. The information givenmost strongly supportswhichofthe following general claims? A. If,in a city with sharplydeclining population,policeprotection and water linemaintenancedo not deteriorate, some other service previously providedby the city will deteriorate or beeliminated. B. If a city'staxrates are held stableover aperiod of time,neither the populationnorthe levels of city services providedwill tend to decline over that period. C. If a city's population declinessharply,policeprotection and water linemaintenance arethe services thatdeteriorate most immediately and most markedly. D. A citythat suffersrevenue lossesbecause of a sharp declinein population can makeup some of the lost taxrevenue by raisingtaxrates, provided the city's tax rates arelow in relation to those of other cities. E. A city that is losing residents becausetaxrates are perceived astoo high by thoseresidentscanreverse this population trend by bringing its tax rates down to amoremoderate level.
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