In the Context of Research,an Independent Variable Is Best Defined

In the context of research,an independent variable is best defined as:

A) the variable measured in a research whose value remains fixed.
B) the primary variable that relates the dependent variable to the experimental value.
C) the variable that is manipulated to test its affect on the dependent variable.
D) the value that most accurately generalizes research findings and conclusions.
E) the value that measures the reliability of a particular procedure.