The US entered World War II, which had begun in Europe in 1939, after the Japanese attacked the US military bases at Pearl Harbor, HI on December 7, 1941. The war finally ended in August 1945. For the US, what was the key outcome of this war?

	a.	The development of atomic weapons technology had made the US the greatest military power in the world.
	b.	The US military victories in conjunction with its booming economy had transformed the US into the world’s leading superpower.
	c.	All of these answers are correct.
	d.	The war had given rise to a series of technological innovations like Zippo lighters, Spam, and atomic bombs that would fuel the American economy for decades.