PT38.S1.Q16 - increasing size of a police force

babybenny

http://7sage.com/lsat_explanations/lsat-38-section-1-question-16/

I had a hard time to solve this question and couldn't find the exact flaw.

I was confused between B and C and ultimately chose C, but the answer is D.
I have no idea why D is right and others are wrong.

Can anyone explain me this question?
Thanks!

ikethelsat

The original (flawed) argument can be broken down into something like this:

"Because a particular way of tackling a problem only stops the effects of that problem, and not the causes, it should not be used at all."

I can see why B was a little bit tempting to you, but do you see that the argument doesn't actually follow the same flawed pattern at all? It's argument is (a) not flawed and (b) goes more like this:

"A particular way of tackling a problem would work against the smaller elements of that problem, but would actually enhance the worst effects of that problem, and thus should not be used."

You can rule out C immediately because the argument does not follow the pattern at all - it ends with the advice that the solution should ALWAYS be undertaken. We are looking for arguments that end with "should not be".

D is perfect - it fits our broken down argument almost word for word.