The reason/ reasons for the growth of the US economy in the early 1920s were?

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Introduction of mass production

Role of Henry Ford

Mass production lowered the costs of goods

All of the above

answer is D.

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Detailed Solution

The introduction of mass production and lowered the costs of goods, Henry Ford's role and other factors contributed to the US economy's expansion in the early 1920s. Henry Ford introduced mass production in the US economy in the 1920s. He adopted the slaughterhouse assembly line technique, allowing for faster and cheaper vehicle production. He adopted the assembly line of the Chicago slaughterhouse to manufacture cars in plants, which increased the output per worker as they were doing the same work continuously and repeatedly. In addition, mass production lowered the cost of production, and due to this, its affordability increased. Now, these durable goods are more accessible by a more comprehensive section of society, creating an economic boom in the 1920s in the US.

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