OE:
This is a tricky question since the conclusion to be strengthened appears in the question stem, rather than as part of the argument. The last premise may be mistaken for a conclusion, but it is presented as factual data. To solve this Conclusion Strengthening question, let's first break down the argument:
Premise A: children suffer from tantrums preceded by growing aggravation
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Premise B: the medication limits the heart rate
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Premise C: as a result, 80% of the aggravation and
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