The Comparison Group Evaluative Research Design Is Better Than the One-Group

The comparison group evaluative research design is better than the one-group pretest-posttest design because you are in a better position to ______.

A) generalize your study findings to the study population and assert that generalization is a major strength of your study methods
B) assert that it was your intervention that caused the measured client growth rather than something else, like normal growth over time
C) assert that you have achieved reliability and validity in regard to the measurement of your study variables
D) assert that your data were found to be statistically significant