The Native American group that participated as a middleman in a vast trade network stretching from California to Vancouver Island is known as the Chinook.
- This is evident in the fact that the Chinook was resident around this area on the Pacific Northwest coast of the continent.
- Also, during this period, the Chinook Jargon was a kind of pidgin language for trading between the buyers and the seller.
Hence, in this case, the correct answer is the Chinook.
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