Which factor most contributed to the United States' declaration to end World War I?

the United States provided arms, tanks, ships, fuel and food to its allies

Germany sinking ships passenger and merchant ships

Explanation:

Germany had been sinking passenger and merchant ships (with Americans on board). Woodrow Wilson, decided enough was enough and went to congress and ask that war be declared on Germany.

c) troops march forward in close formation against newer, more accurate weapons

charles lindbergh hope this