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A control can be best defined as:

A) a variable that is kept constant in an experiment
B) an experiment where the final results are known ahead of time
C) a hypothesis that regulates the results of an experiment
D) an experiment that is undertaken both in the field and in the laboratory
E) a variable that changes during the course of an experiment

User Lancerex
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1 Answer

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22 votes

Answer:

A) a variable that is kept constant in an experiment

User PEBKAC
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