the answer is a. diphthog
Here’s a link to an article about what makes someone admirable, I hope it helps
https://speedypaper.com/essays/what-makes-a-person-admirable
The correct answer is that he is D. indicating what happens to tribes that don't unite against the whites.
We know this because immediately afterwards he is answering his question: "They have vanished before the avarice[greed] and oppression of the white men" - so he says that this might also happen to the others.
Id say c and d
The word nonchalantly is used to describe someone's behaviour it's another word for casualy