In a Study Cited in the Textbook, Schedlowski Asked Participants

Multiple Choice

In a study cited in the textbook, Schedlowski asked participants to drink green, lavender-scented strawberry milk. Half the participants took an immunosuppressive drug along with the milk. The remainder took a placebo pill. Five days later, and then again 11 days later, all participants took a placebo pill with the milk. Both times, Schedlowski measured the immune responses of all participants. In this study, the green milk is a(n) _____, whereas the immunosuppressive drug is a(n) ______.

A) CS; NS
B) CS; US
C) US; CS
D) US; NS