GMAT Critical Reasoning (CR) | Consumer Advocate: The new soft drink, Mango Paradise,

this is a classic example of generalization from a sample, so we need to make sure what is true for one drink, it is true for all other different drinks as well, choice C does exactly that

can we conclude from one drink sample that this chemical is dangerous? it might be possible that this mango drink itself contains some harmful chemical and it may cause the heart attack .
choice c says that all other drinks containing this chemical can cause the heart attack, means this chemical is alone responsible
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