The sentence that best explains why the Germans sank US ships at the start of World War I is option D. The Germans wanted to frighten the US government into voting against a declaration of war.
In 1917, the continued submarine attacks on American merchant and passenger ships, and the "Zimmerman Telegram's" implied threat of a German attack on the United States, had served to sway American public opinion in support of a declaration of war.
Therefore, the correct answer is as given above.
learn more about Zimmerman Telegram's: https://brainly.com/question/24372880
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