Question

the effects of drug x dosage on blurry vision improvement were tested for multiple sclerosis patients. drug x dosage was the ____ variable in the experiment. dependent control group independent

Explanation:

In an experiment, the independent variable is the factor that is manipulated or changed by the researcher. Here, the researchers are changing the dosage of drug X to see its effect on blurry - vision improvement in multiple sclerosis patients. The blurry - vision improvement is likely the dependent variable that depends on the drug X dosage. A control group would be a group not receiving the drug or receiving a placebo.

Answer:

C. independent