Which of the Following Was an Effect of the Fur

Which of the following was an effect of the fur trade on the indigenous people of North America?

A) They were able to ignore it for long periods of time.
B) It caused serious problems for those groups that were dedicated to it once the fur-bearing animals were gone.
C) It led to the development of close ties between indigenous peoples and the major nations of Europe and Asia.
D) They learned how to negotiate effectively with the governments of Europe until the furs were gone.