When Two Groups in a Nonequivalent Control Group Design Do

Multiple Choice

When two groups in a nonequivalent control group design do not differ on the pretest,the researcher can conclude that

A) the two groups are equivalent.
B) the two groups are not equivalent on any dependent variables.
C) the two groups will show the same natural growth rate over the course of the study.
D) the two groups are equivalent only on the dependent variable measured on the pretest.