medium · LSAT Logical Reasoning
The mayor defends the city's camera program by pointing out that crime fell in every district where cameras were installed. But crime fell by just as much in comparable districts that had no cameras, all of them tracking a citywide decline that began before the cameras went up. The mayor's evidence therefore does nothing to show that the cameras reduced crime, whatever other merits the program may have.
The claim that crime fell just as much in comparable districts without cameras plays which one of the following roles in the argument?
- It establishes that crime did not decline in any district where cameras were installed.
- It shifts the issue from whether the cameras reduced crime to whether residents approve of them, and therefore treats resident approval as the relevant measure of the cameras’ success.
- It supplies a control comparison showing that the observed decline need not have resulted from the cameras.
- It states the conclusion that the camera program has no merit of any kind.
- It concedes the mayor's causal explanation before the author qualifies that explanation.
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