Economies of scale occur when there are : (a) increases in long-run average costs when output increases.(b) no changes in long-run average costs when output increases.(c) decreases in long-run average costs resulting from increases in output.(d) decreases in output resulting from decreases in input.

(C) decreases in long-run average costs resulting from increases in output.

Explanation:

Economies of scale are those where the larger the scale of operation of a company is (increases in output), the smaller the cost per unit of output is (decreases in average costs). This concept applies to a great variety of companies, and it was first developed by Adam Smith. It is also the opposite of disectomies of scale.

carefully examine the map above. based on your knowledge of colonialism in africa, the area attributed to belgium on this map is most likely the democratic republic of the congo.