GMAT Critical Reasoning (CR) | Re: It is sometimes argued that U.S. income-tax laws must have some large

Goal To Weaken :
U.S. income-tax laws must have some large 'loop-holes'...

We have to find an option that says there are no loopholes
So 'B' fits perfectly

C D E are out of scope

A- looks to be a trap option..
Hiring a specialist may mean they know the loophole and take advantage of it.
It can also mean they just know how to save tax in an efficient way and there are absolutely no loopholes in the system
So it cannot be A

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