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The most accurate answer is
James Madison
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The answers are (A) and (C).
The Marshall Plan was issued by Harry Truman after the World War II to send financial aid to countries in Europe. Over 15 million dollars were sent to help the countries rebuild their economies and remove trade barriers between European neighbors.
The Russian-German Treaty of Nonaggression of 1939 "<span>a. Freed Hitler to pursue a more aggressive policy in western Europe," since Hitler no longer had to worry about fighting on the eastern front against Russia. </span>
Steve Wozniak designed 5.25 inch floppy disk <span> in 1978, which fostered the development of DOS.
The invention of 5.25 inch floppy disk make it possible for personal computers to be distributed in smaller size.
The IBM quickly see this as an opportunity and started to massively produce computers with Disk Operating System (DOS) in 1981</span>
