What caused American trade to be cut off from the central powers during ww1?

A major part of the British strategy was to impose a blockade on Germany. American trade with the Central Powers simply could not be permitted. ... It was this situation that prompted submarine warfare by the Germans against Americans at sea. After two and a half years of isolationism, America entered the Great War.

Explanation:

i believe 5 is correct answer

i think the answer would happen to be the letter b

because the bar never runs out

couples always argue