The answer is A ! Hope this helps
<span>World
War I (First World War or Great War o WWI) started on July 28, 1914 and ended
on November 11, 1918, was a war focused in Europe. The war divided two nations:
the Allies consisting of Russian Empire, France, Italy, Japan and United
Kingdom or British Empire against the Central powers consisting of Germany,
Ottoman Empire and Austria-Hungary. The war, introducing new military
technology weapons, had killed an estimation of nine million soldiers in
annihilation, bloodshed and massacre. Technology weapons such as Tank Corps, Vickers
gun (British invention) and Lewis gun (American-invented), aeroplanes, poison
gas and cellucotton.</span>
