3. What are the factors that cause a producer's average cost per unit to fall as output rises called?

A) economies of scale
B) licenses
C) patents
D) franchises

answer; /// the correct answer is evidence of the olmec civilization has been found in southern american in a hot steamy forest, archaeologists have found earthen artifacts at several sites that were evidence of the olmec civilization. these   artifacts were mounds,courtyards and pyramids build of stones, also on top of the mounds were many monuments made of stone, some of these stone structures are very large, they weigh as much as 44

answer; /// i believe that they became successful farmers; ///////////////

answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;

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