Some studies have shown that peppermint odor increases people’s mental sharpness, especially when they solve math problems. Which best describes how this could be a valid scientific claim?

A scientific claim is supported when it is tested systematically and produces repeatable results. A controlled setting helps rule out other factors that could affect mental sharpness, and repeated results make the finding more reliable. Publishing on Wikipedia, the scientist’s past peer review, or using easy math problems does not by itself establish that peppermint odor has this effect.

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