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23. Christina wanted to know whether the eating behavior of goldfish is affected by music. She set up a fish

tank. Every day, she played music for the fish and measured how much the fish ate. What is Christina

missing from this experiment?

A. a control group

B. a measurable result

C. a dependent variable

D. different types of fish

Sagot :

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Answer:

a control group

Explanation:

To have a succsessful experiment you need something to compare your variable to.

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