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Natasha2012 [34]
3 years ago
5

In an experiment the effect of caffeine on alertness in students with attention deficit disorder,the caffeine if the

Medicine
2 answers:
Luda [366]3 years ago
5 0

Answer:

B

Explanation:

igor_vitrenko [27]3 years ago
3 0
Caffeine is the independent variable actually
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