Determine whether the study depicts an observational study or an experiment.

Dogs are randomly divided into two groups. One group is trained using food as a reward;

the other is trained using sound cues. After 2 months, each group is taught a new skill to

compare obedience.

Choose the correct description of the study.

A.

The study is an experiment because the researchers control one variable to determine the effect on the response variable.

B.

The study is an observational study because the study examines individuals in asample, but does not try to influence the variable of interest.

C.

The study is an experiment because the study examines individuals in asample, but does not try to influence the variable of interest.

D.

The study is an observational study because the researchers control one variable to determine the effect on the response variable.