<span>A basic assumption of economics is rational self-interest.
Answer: B</span>
"Cultural diffusion" is about:
d. The transmission of trends from one culture to another
Indians plains the buffalo was very valuable to the plains Indians .the buffalo meat was dried and mixed with marrow and fruit to become a food that they would keep for long periods of time .The Indians also used ropes,shield s,and clothing . Their tepees were also made from the buffalo hide .
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