Answer:
d. Reba used only one theory in her study of cheating
Explanation:
The term reductionism refers to when an individual analyzes or describes a certain complex phenomenon using very few and simple fundamental constituents. Such as Reba using only one theory in her study of cheating. Since the concept of cheating can have many vastly different theories that focus on trying to explain it, then it is reductionism when someone applies only one theory in order to summarize cheating as Reba is doing.