Answer:
The answer is:
C. "Both the main river and its smaller branches provided a means of transportation, and the Penobscot were extremely skilled at making canoes from the bark of birch trees...."
Explanation:
I just read the passage, and based on the Penobscot Indians passage, this key detail described how the tribe adapted over time to the landscape, in learning how to make canoes to transport themselves on the river.
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