Answer:
D, understanding the impacts of the Khmer Rouge policies on Cambodian society
Step-by-step explanation:
The text is an informational passage about the rise of the Khmer Rouge, however, the answer is not A because the passage does not say WHY these events occurred. B is also incorrect because the passage does not discuss anything before the rise of the Khmer Rouge. And lastly, C is COMPLETELY incorrect, because, nowhere in the passage does the author talk about the contributions of ethnic minorities in Cambodia.
HOPE THIS HELPS <33333
-Silver