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OpenStudy (princessaurora):
*Will fan and Medal* Which of these is a key feature of an experimental study? A) The treatment in the experiment should be simple enough for each individual in the experimental group to understand. B) The treatment in the experiment must vary for each individual in the experimental group. C) The treatment in the experiment must be applied to each of the individuals in the experimental group. D) The treatment in the experiment should be short so that each individual is tested quickly.
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OpenStudy (pawanyadav):
I think it should be C
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