The correct answer is: The country began to recover from the effects of the Depression.
World War II emerged from the Great Depression as it destabilized the governments and economies around all around the world. In the United States the New Deal was promoted to help the country's reconstruction. Although it had some positive impact, it didn't put an end to the crisis.
With the start of war the U.S. made "conversion" its key issue to succeed in economy, it's industry started producing armaments and other war materials rather than civilian goods, companies were convinced to convert to the armament industry. This was so effective that at the end of the war, the U.S. was without doubt the stongest economy in the globe, a proof of that is that the U.S. dollar was set as the global currency.
