The sectors of the economy that has grown the fastest in the US in the mid-1970 are of manufacturing. Hence option D is correct.
What is manufacturing?
Manufacturing is secondary activity and refers to the production process in factories and industries. Manufacturing is an essential sector of the economy and is established in the United States in the mid-1970 after the start of the industrial revolution in the 18 th century.
Find out more information about the manufacturing.
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