A non-falsifiable hypothesis cannot be tested or proven false. Among the given options, option c states that the diet works by eliminating invisible toxins, which is unmeasurable. Thus, option c is the correct answer. ;
The correct example of a non-falsifiable hypothesis among the options provided is C, which claims the XYZ diet works by eliminating invisible toxins that cannot be measured or tested. Other options can be validated through empirical methods. A non-falsifiable hypothesis lacks the ability to be proven false or tested accurately.
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