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Describe why this is a controlled experiment. A. Only one variable is changed B. two variables are changed C. the plants grew tall in the control group D. the plants grew tall in the experiment
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Describe why this is a controlled experiment.

A. Only one variable is changed
B. two variables are changed
C. the plants grew tall in the control group
D. the plants grew tall in the experiment

User Vakio
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1 Answer

3 votes
A Only one variable changed
User Twalters
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