How did large coorperations achieve economies of scale

Explanation:

Reducing the cost of units per production is the main benefit of economies of scale. Larger companies are more likely to achieve economies of scale than smaller companies because they are able to produce more goods and therefore can spread out costs over a larger number of goods.

i think the answer is c, rivers.

explanation:

sometimes, borders fall along natural boundaries like rivers or mountain ranges. for example, the boundary between france and spain follows the crest of the pyrenees mountains. for part of its length, the boundary between the united states and mexico follows a river called the rio grande. the borders of four countries divide africa’s lake chad: niger, chad, cameroon, and nigeria.