they claimed that without slaves the economy would collapse I think, I'm not quite sure if I'm remembering correctly though
Answer: Catalogs
Explanation:
In 1872, Aaron Montgomery Ward took advantage of the growing shipping business in America to establish the Montgomery Ward Company.
The company's modus operandi was to showcase goods in a catalog and distribute it to people who would then order the products they liked. The company would then deliver it by rail.
Starting with a single-sheet catalog that offered only 163 items, the company grew to serve 3 million customers by the year 1904 and are still in existence today.
Expansion of the suburbs.As far as the option about "low birth rate," that's very much wrong. The period from 1946 to 1964 is known as the "baby boom" period in the United States. More babies were born in America than ever before in 1946, and the high birth rates continued for a number of years. Birth rates in the late 1940s and 1950s were much higher than they had been before, especially during the very low years of the Great Depression and World War II.
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