GMAT Critical Reasoning (CR) | Since publicly traded companies opt

Premise : Publicly traded companies opt to shield some negative information from the market -> negative information tends to be shared progressively less and in wider communicationchannels
Conclusion : Public has less negative information than do the company's employees of the most private circles, such as theCEO

POE:
A - Positive information is out of scope
B - It support the conclusion, but whether it is an assumption or not? Leaving it for negation method
C - It is clearly out of scope,
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