What did india produce to trade along the silk road

When conducting research for forming a hypothesis, which practice should historians follow?

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

Enforces the laws.a.legislativeb.executivec.judicial