If the Means from a 2 X 2 Study Are

Multiple Choice

If the means from a 2 x 2 study are displayed in a graph and the lines on the graph are perfectly parallel,then what can you conclude?

A) There is no main effect for either of the two factors
B) There is a main effect for both of the two factors
C) There is no interaction between factors
D) There is an interaction between factors