Which of the following describes economies of scale? A system that weighs the amount of coal necessary for each megawatt produced
A country whose economy is based on the metric scale
A pricing scheme that allows entrepreneurs to charge different prices
A concept that says when more units are produced, each unit has a lower cost

In 1914, alabama produced 1.7 million bales of cotton, but three years later produced only 515,000, bales. meanwhile, in georgia, 5.2 million acres of land was dedicated for cotton production in 1914, but by 1923 there were just 2.6 million acres used for growing cotton. all of this was the result of the work of a tiny insect: the boll weevil. alabama and georgia first felt the effects of the boll weevil at different times. what would account for this difference in timing?