I think B but I'm not sure if this is right. We are learning about this now (Im in 6th) in Social Studies. I hope I helped!
Answer:
It's the last one. "The population of indigenous peoples in the Americas declined after Europeans started establishing colonies there."
Explanation:
It's the only one that isn't a statement of opinion. It's stating a solid answer without stating their own personal feelings on the topic.
I hope this helps!
C. battle of wounded knee!