题目选项分析

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?

【选项】Many home security systems have never produced false alarms.