GMAT Critical Reasoning (CR) | Re: A team of Swedish scientists recently concluded a fifteen

It might sound a bit silly but how a Fact go against a scientific finding?
I mean the first one is just a fact : Previous studies had been considered inconclusive.
The second one though, is a finding! : The lack of omega-3 is a reason why some people develop kidney cancer at lower rates.

How can a fact (that previous findings were inconclusive) go against a finding?

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