Christina, who is working on her research design for her senior thesis in her development class, announces she wants to do a true experiment to explore alcoholism and Alzheimer's. What do you say to her, and why?
A. True experiments are very difficult to do in development because it is impossible to have a control group.
B. True experiments are very difficult to do in development because they are time-intensive.
C. True experiments are very difficult to do in development because you cannot have truly random group assignments.
D. True experiments are very difficult to do in development because they are so hard to analyze.
Answer: C
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