In a 2 * 2 Complex Design,one Independent Variable Was

Multiple Choice

In a 2 * 2 complex design,one independent variable was shown not to have a statistically significant main effect on the dependent variable.Based on this,we can state that

A) the independent variable has external validity over the levels of the second independent variable.
B) it is not a relevant independent variable.
C) for the variable to be considered relevant in this experiment, it must interact with the second independent variable.
D) the variable will definitely interact with the second independent variable in this experiment.