Question

multiple choice question
a control variable is a factor that is held constant in order to test the relative impact of ______.
○ a dependent variable
○ an independent variable
○ a hypothetical variable
○ the causal factor
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Explanation:

Control variables are held constant in research to isolate and accurately measure the effect that an independent variable has on a dependent variable. By controlling other factors, the focus remains on testing how the independent variable impacts the outcome.

Answer:

B. an independent variable