World War II can be considered a “total” war because it involved multinational combat across the world, it sparked massive production and industrialization efforts, and it __________.

A “total” war mobilizes entire societies and economies, and World War II caused unprecedented loss of life and destruction. Choice C completes the statement: it “resulted in death and destruction never witnessed before.” The other choices are inaccurate: New York was not destroyed, the war did not cause another long-lasting depression, and submarines, airplanes, and tanks had been used in earlier wars.

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