The resumption of unrestricted submarine warfare by Germany, from 31 January 1917.
<span>German u-boats were sinking US merchant ships and killing US seamen even though USA was a neutral. Further, ships of other neutral nations sailing to and from the US were also being sunk.All this was adversely effecting the US economy.
Hope this helps :)</span>
You needed to add the Answer Choices to the question...
the answer is October 12, 1492
Usually it would be the less there is the more people want it which is not an answer here it looks like. I would have to say B because it would be the opposite of what I just said which would still be correct.
