The passage is:
"Whatever you wanted of me I have obeyed. The Great Father sent me word that whatever he had against me in the past had been forgiven and thrown aside, and I have accepted his promises and came in. And he told me not to step aside from the white man's path, and I am doing my best to travel in that path. I sit here and look around me now, and I see my people starving. We want cattle to butcher. That is the way you live, and we want to live the same way." Sitting Bull, 1883.
The correct answer is C) his people are suffering because of the settlers.
Sitting Bull's point in this passage is that his people are suffering because of the settlers.
When Sitting Bull writes “I sit here and look around me now, and I see my people starving”, it clearly means that his people are suffering because of the presence of the settlers. The tribe is starving meanwhile the settlers are living a better life. Sitting Bull want the same opportunities than white men, and in the passage is understood by the tense “We want cattle to butcher. That is the way you live, and we want to live the same way." He is only asking for respect and dignity.