max is testing how caffeine affects test scores. what might be a constant in this experiment?\nthe type of…

max is testing how caffeine affects test scores. what might be a constant in this experiment?\nthe type of test the subjects are taking\nthe subjects favorite foods\nthe eye color of the subjects\nall of these

max is testing how caffeine affects test scores. what might be a constant in this experiment?\nthe type of test the subjects are taking\nthe subjects favorite foods\nthe eye color of the subjects\nall of these

Answer

Brief Explanations:

In an experiment testing how caffeine affects test - scores, variables like favorite foods and eye color are irrelevant to the relationship between caffeine and test - scores. Also, to accurately measure the impact of caffeine on scores, the type of test should remain the same. So all these can be constants.

Answer:

D. All of these