The piece of information most useful in evaluating this claim is the research study the group cites as evidence was proven to be inaccurate (Option C).
A relatively recent publication indicated that certain vaccines might produce autism in children, thereby raising concerns about their use.
However, it has been shown that the scientific evidence in this publication may be erroneous and therefore the publication was retracted.
In conclusion, The piece of information most useful in evaluating this claim is the research study the group cites as evidence was proven to be inaccurate (Option C).
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