The Main Reason to Use a 2 X 2 Factorial

Multiple Choice

The main reason to use a 2 x 2 factorial design instead of two separate experiments (with one IV per experiment) is to

A) find the main effects of each independent variable.
B) find an interaction between the independent variables.
C) save time.
D) There is no good reason to use a 2 x 2 design if you can conduct separate experiments instead.