Answer:
"How did the role of religion in Europe change between the postclassical and modern eras?"
Explanation:
The historian is studying the role of religions in history. Since it is necessary to ask if she is organizing the study by period, the question needs to be made clear. A good example of the question would be "How has the role of religion in Europe changed between post-classical and modern times?" This question is asked based on two periods which are the post-classical period and the modern period. By asking this question it is possible to know if the historian is organizing the study by period.
