medium · GMAT Verbal Reasoning
A researcher assumes that a specific supplement reduces blood pressure because participants in a study saw a 10% decrease over 6 months.
This conclusion assumes which of the following?
- The participants in the study were aware that they were taking the supplement during the trial period.
- Blood pressure cannot be meaningfully reduced through any other method besides taking this particular supplement.
- No alternative factor, such as lifestyle change during the study, was responsible for the observed decrease.
- Every single participant who enrolled in the six-month study happened to be exactly the same age as one another.
- The supplement guarantees an identical 10 percent reduction in blood pressure for each future user.
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