This event would be Germany's sinking of an American vessel despite both nations being at a neutral diplomatic standpoint at the time. When the Germans sank the American vessel, without any actual reason to do so, this drastically coldened the relationship between the US and Germany.
B
if you weren't born in the US, you can't become the president or vice president
Here so the other guy gets brainiest :)
<span>Nevada and California is your answer</span>