Kim and Mary Are Both Participating in an Experiment Examining

Multiple Choice

Kim and Mary are both participating in an experiment examining the effect of adding graphic warning labels on cigarette packages to the written warning labels that are already required by law. Kim saw a package in which half of the package had a picture of diseased lungs included with the written warning label, whereas Mary only saw the written warning label without a picture on the package the researcher showed her. Kim was part of which group in the experiment?

A) primary group
B) covariate group
C) experimental group
D) control group