A Procedure for Ensuring That ________ Is Experimental Design

Multiple Choice

A procedure for ensuring that ________ is experimental design.

A) any and all effects on all experimental values are measured
B) the change in the dependent variable may be solely attributed to the change in the extraneous variable
C) the change in the independent variable may be solely attributed to the change in the complex variable
D) the change in the dependent variable may be solely attributed to the change in the independent variable