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Wittaler [7]
2 years ago
5

20 POINTS! Why is it important to use a controlled experiment?

Biology
2 answers:
Otrada [13]2 years ago
8 0

B. So you can be certain of the link between the variables
that’s the answer
gregori [183]2 years ago
3 0
Answer is B !!!

you have to know what youre doing
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