Determine whether the study depicts an observational study or an experiment. Students are randomly divided into two groups. One group is taught German in a primarily oral class; the other German test to compare fluency.
A. The study is an observational study because the researchers control one variable to determine the effect
B. The study is an experiment because the researchers control one variable to determine the effect
C. The study is an experiment because the study examines individuals in a sample, but does not try to influ
D. The study is an observational study because the study examines individuals in a sample, but does not try