Nico has conducted an observational study to learn about how different personal experiences affect car purchases. Nico surveyed 300 new car buyers at the auto mall and found that 75% of the buyers were shopping for the same model of a car they have owned before. What conclusion can Nico make from his study?
A. Owning the same model of a car previously causes a buyer to purchase that car again, but he cannot draw a cause-and-effect conclusion from an observational study.
B. There may be a link between owning a model of a car and buying that model again, but he cannot draw a cause-and-effect conclusion from an observational study.
C. There may be a link between owning a model of a car and buying that model again, and he can draw a cause-and-effect conclusion from an observational study.
D. Owning the same model of a car previously causes a buyer to purchase that car again, but he can draw a cause-and-effect conclusion from an observational study.
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