688. Mayor: False alarms from home security systems waste so much valuable police time that in many communities police have stopped responding to alarms from homes whose systems frequently produce false alarms. This policy reduces wastage of police time but results in a loss of protection for some residents. To achieve a comparable reduction in wastage without reducing protection for residents, the council has enacted a measure to fine residents for repeated false alarms.

Which of the following, if true, casts the most doubt on whether the measure enacted by the council will achieve its goal?

A:A fine in the amount planned by the council will not cover the expenses police typically incur when they respond to a false alarm.

B:Homes equipped with security systems are far less likely to be broken into than are homes without security systems.

C:The threat of fines is likely to cause many residents to deactivate their security systems.

D:The number of home security systems is likely to increase dramatically over the next five years.

E:Many home security systems have never produced false alarms.

参考答案及共享解析

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正确答案： C:The threat of fines is likely to cause many residents to deactivate their security systems.

题目类型：削弱题

题目场景：市长：来自家庭安全系统的假警报浪费了太多宝贵的警察时间，以至于在许多社区，警察已经停止对那些系统经常产生假警报的家庭的警报作出反应。这项政策减少了警察时间的浪费，但导致一些居民失去保护。为了在不减少对居民保护的情况下，实现相对的减少浪费，安理会制定了一项措施，对反复出现错误警报的居民处以罚款。

题目推理：什么事实或事件最能降低镇议会新颁布的措施实现其目标的可能性，即在不影响家庭保护的情况下减少警察时间的浪费？请注意，目标不是消除所有浪费的警察时间或支付所有的费用；预计会有一些随机浪费。但是，如果许多居民因为不想被罚款而关闭了安全警报（甚至功能良好的系统），这可能会降低这些居民的家庭保护水平。选C

选项分析：A.按照市政局的计划，罚款金额不足以支付警察对虚假警报作出反应时通常产生的费用。目标重点不是费用，而是在保证安全的情况下不浪费时间

B.装有安全系统的家庭比没有安全系统的家庭更不容易被闯入。与逻辑链无关

C. 罚款的威胁可能会导致许多居民停用他们的安全系统。正确

D．未来五年，家庭安全系统的数量可能会大幅增加。无法削弱

E．许多家庭安全系统从来没有产生假警报。过去没产生不代表一直不产生，无法削弱