The answer would be "The battle of the Bulge". This is also the largest Ardennes Offensive which was the largest battle fought on the Western Front in Europe.
The correct answer is D.
Although the RMS Lusitania was a British ship, when it was sunk by a German submarine in 1915, 234 American citizens died. Nevertheless, in 1916 the Sussex Pledge took place, being a promise made by Germany in which they claimed to attack with no previous warning any armed ship. However, in March 1916 Germany torpeded a French ship that had no weapons, meaning this, and announcing Germany the resimption of unrestricted submarine warfare. Finally, based on the German decission and having reasons because of the Lusitania deceased people, the US declares war on Germany in April 1917.
B “any means necessary” contradicts “nonviolent methods”
Under mercantilism, merchants can only buy from the mother country and their trade becomes limited [as they cannot sell nor buy from other countries but only their mother country]. While under capitalism, they can trade internationally and choose what they want to buy or sell without intervention of a government.