It would be "<span>a. the Bolshevik Revolution" that occurred in 1917, since this was during World War I, and the Revolution forced Russia to actually withdraw from the war. </span>
The answer is A.)they reopened trade with the middle east during the 14th century.
The two empires have traded for 1800 BC and they have gone to the place between China and Russia to trade. They traded happiness flies food clothing etc however some people died in the journey of trying to trade.
