Which statement best summarizes the orgins of World War II?
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 a. the decision to help rebuild the countries that lost during tWorld War I allowed former military leaders to quickly regain power and reignite old tensions.
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 b.authoritarian leaders hoping to bring their countries glory through expansion were largely allowed to seize neighboring territories unchallenged.
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 c. chaos following violent nationalist revolutions across Europe and asia erupted into a series of civil wars that spread across the entire globe
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 d. the rise of the soviet union and the threat of international communism led countries to build up huge millitaries to defend themselves from soviet agression.