America was the only major industrial nation that was not devastated by war. The economy benefited from an expanding internal market and heavy investment in research and development
Answer:
A. law of large numbers
Explanation:
Law of large numbers is the mathematical concept of probability that helps insurers estimate the statistical likelihood of mortality or morbidity losses at any given age.
This idea states that as the number of exposure or an attainment of a larger value increases, it is usually easier and more accurate to predict the likelihood of mortality or morbidity losses. The law of large numbers is the mathematical principle of probability that insurance is based on.
With the clear differences between northern and southern areas in terms of economy and politics, immigrants going to northern areas, and with the fear that the southern interests, including slavery, in congress would be weakened caused the southern people (mainly represented by whites) to cease from the Union.