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16 October, 20:14

While studying the impact of ginkgo biloba on memory, a researcher has one group of rats on a normal diet while the other rat group is given measured doses of ginkgo biloba with their meals. While observing the rats run a complicated maze, the researcher notes that the ginkgo biloba-enhanced rats' maze is more brightly lit than the normal diet rats' maze. The difference in lighting in this study is a (n)

A. confound.

B. dependent variable.

C. hypothesis.

D. independent variable.

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  1. 16 October, 23:21
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    D. independent variable.
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