Suppose an Independent Variable Does Not Have Any Effect on the Dependent

Multiple Choice

Suppose an independent variable does not have any effect on the dependent variable in a single-factor experiment.Which of the following is one of the reasons for being cautious about saying that the independent variable is irrelevant?

A) We know the independent variable could interact with another independent variable when used in a complex design.
B) We can assume this independent variable would not have an effect if different levels of the variable had been tested.
C) We know that experiments in which an independent variable does not have an effect are inherently uninterpretable.
D) We know that single-factor experiments cannot be used to identify relevant independent variables.