Question 7 of 10 The independent variable is: A. what happens as a result of what is changed in an experiment. B. only present in some experiments. C. what comes after the dependent variable. D. what the researcher controls directly.

The independent variable is:<br /><br />D. what the researcher controls directly.<br /><br />In an experiment, the independent variable is the factor that is manipulated or controlled by the researcher to observe its effect on the dependent variable.