The Goal of a Random Groups Design Experiment Is to Establish

The goal of a random groups design experiment is to establish the independent variable as the cause of any differences in the dependent variable.The logic of accomplishing this involves

A) beginning with comparable groups, treating them differently, and ending with differences among groups.
B) beginning with comparable groups, treating them the same, and ending with no differences among groups.
C) beginning with noncomparable groups, treating them differently, and ending with differences among groups.
D) beginning with noncomparable groups, treating them the same, and ending with no differences among groups.