All of the factors that can change in an experiment are called variables. Which of the following is true about the variables in an experiment? OA. One variable should be kept the same and at least two variables should change. OB. All variables should change. OC. All variables should be kept the same. OD One variable should change and the others should be kept the same.
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All of the factors that can change in an experiment are called variables. Which of the following is...
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