Sara, a researcher, and her team conduct a study to examine the effect of WakeMe, an energy drink, on the intelligence quotient (IQ) levels of people in a small district of Casadia. The people of Casadia are randomly divided into two equal groups. Members of one group, Group WM, are made to drink WakeMe and then take the IQ test. Members of the other group, Group NoWM, are made to drink plain water packaged in WakeMe bottles and then take the IQ test. In this scenario, who among the following exemplifies the control group?
A. Sara and her team
B. members of Group WM
C. members of Group NoWM
D. the team that designs the IQ test
Answer: C
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