Answer:
D. lead to the creation of command economies.
The United States emerged as a great industrial power following World War I -- the most powerful nation in the world, in fact.
The growth of the United States as the world's leader in industry had been proceeding rapidly already prior to the Great War (which we know as World War I). By 1900, 38% of the world's wealth was held by the United States. By 1914, the US produced as much coal as Britain and Germany combined, as well as producing over 40% of the world's iron.
But before World War I, the United States tended to take an isolationist stance toward other nations. World War I advanced the US into superpower status as a nation that used its industrial might to involve itself in global affairs.
The author who described the problems to industrialize England was Andrew Carnegie
Roosevelt said that he wanted to increase the number of judges on the Supreme Court because he was facing a judicial pushback on many of his New Deal policies, and wanted to appoint judges who would likely be in favor of his policies.
