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 a differences in the dependent variable.The logic of accomplishing this involves

A) beginning with noncomparable groups,treating them the same,and ending with noncomparable groups.
B) beginning with noncomparable groups,treating them differently,and ending with comparable groups.
C) beginning with comparable groups,treating them the same,and ending with noncomparable groups.
D) beginning with comparable groups,treating them differently,and ending with noncomparable groups.