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What prompted the United States to join the fighting in World War 1.a:the assassination of an archduke b:an attack on pearl harbor c:the sinking of American ships in the pacific d: the sinking of American ships in the Atlantic

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A: the assassination of an archduke


User Lakshman Battini
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The answer should be C because Germany shot down a U-boat in the pacific in world war I
User Enchantner
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