Please select all that apply. There may be multiple answers(there areTHREEin total!).

Why would you use atwo-factor ANOVAover a one-factor ANOVA?

inorder to evaluate any interaction effects that may occur between the two variables

in order to evaluate the main effects of two variables simultaneously

in order to evaluate a hypothesis about a single population mean (single treatment)

in order to acquire a better understanding of how multiple variables influence behavior

in order to determine proportionate differences between the categories of one variable