What Is the Advantage of the Pretest in the Nonequivalent

Multiple Choice

What is the advantage of the pretest in the nonequivalent control group pretest-posttest design?

A) The pretest accustoms the participants to the procedures of the study.
B) Participants who experience a pretest generally score higher on a posttest.
C) When groups are not equivalent, researchers can look at changes from pretest to posttest scores.
D) If the pretest scores are different, the study can be discontinued immediately.