What German action prompted President Wilson to ask Congress for a declaration of war?
resuming unrestricted submarine warfare
assassinating the Archduke Franz Ferdinand
attacks on American soil
taking control of Paris

A. Resuming unrestricted submarine warfare.

Explanation:

B. is the wrong war. The Americans didn't care much if at all, and were only somewhat concerned with the Zimmerman telegram.

C. Until Pearl Harbor, there had been no attacks on American soil ever.

D. America didn't directly intervene in the war effort, but did provide lend leases, such as tanks and guns.

churchill warned that the soviet union had cut eastern europe off from the west with an "iron curtain."

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