If the journalist uses the correlational study then she is assuming that correlations are equivalent to causation. Thus, option A is the mistake committed.
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A correlational study is an experimental setup that associates the variables used in the research with each other and allows comparisons.
Here the journalist is just relating the good impact of chocolate on health while the underlying cause is not illustrated and hence is considered a mistake.
Therefore, option A. the correlation is confused with causation.
Learn more about correlation study here:
https://brainly.com/question/27984582
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