Which of the followin describes the main reason the spanish conquistadors needed native american slaves

a. they needed to find gold and send it back to spain
b. the native american slaves aided them wit their tabaco crops.
c. the spanish wanted to convert the native americans to catholicism.

Which action by the us war department angered chief red cloud to the point that he refused to sign the treaty of fort laramie ? a) the killing of buffalo by the united states troops b) the appointment of troops to the powder river basin c) the burning of parts of the powder river basin d) the murder of chief red cloud’s wife